diff --git a/dlls/ntdll/actctx.c b/dlls/ntdll/actctx.c
index e52710565ce..fce6299446c 100644
--- a/dlls/ntdll/actctx.c
+++ b/dlls/ntdll/actctx.c
@@ -3140,14 +3140,14 @@ static WCHAR *lookup_manifest_file( HANDLE dir, struct assembly_identity *ai )
             if (dir_info->NextEntryOffset) data_pos += dir_info->NextEntryOffset;
             else data_pos = data_len;
 
-            tmp = dir_info->FileName + (strchrW(lookup, '*') - lookup);
+            tmp = dir_info->FileName + (wcschr(lookup, '*') - lookup);
             build = wcstoul( tmp, NULL, 10 );
             if (build < min_build) continue;
-            tmp = strchrW(tmp, '.') + 1;
+            tmp = wcschr(tmp, '.') + 1;
             revision = wcstoul( tmp, NULL, 10 );
             if (build == min_build && revision < min_revision) continue;
-            tmp = strchrW(tmp, '_') + 1;
-            tmp = strchrW(tmp, '_') + 1;
+            tmp = wcschr(tmp, '_') + 1;
+            tmp = wcschr(tmp, '_') + 1;
             if (dir_info->FileNameLength - (tmp - dir_info->FileName) * sizeof(WCHAR) == sizeof(wine_trailerW) &&
                 !wcsnicmp( tmp, wine_trailerW, ARRAY_SIZE( wine_trailerW )))
             {
diff --git a/dlls/ntdll/directory.c b/dlls/ntdll/directory.c
index 8f945c972c9..a2b67a63f95 100644
--- a/dlls/ntdll/directory.c
+++ b/dlls/ntdll/directory.c
@@ -234,7 +234,7 @@ static inline BOOL is_invalid_dos_char( WCHAR ch )
 {
     static const WCHAR invalid_chars[] = { INVALID_DOS_CHARS,'~','.',0 };
     if (ch > 0x7f) return TRUE;
-    return strchrW( invalid_chars, ch ) != NULL;
+    return wcschr( invalid_chars, ch ) != NULL;
 }
 
 /* check if the device can be a mounted volume */
@@ -2685,7 +2685,7 @@ NTSTATUS nt_to_unix_file_name_attr( const OBJECT_ATTRIBUTES *attr, ANSI_STRING *
 
     /* check for invalid characters */
     for (p = name; p < name + name_len; p++)
-        if (*p < 32 || strchrW( invalid_charsW, *p )) return STATUS_OBJECT_NAME_INVALID;
+        if (*p < 32 || wcschr( invalid_charsW, *p )) return STATUS_OBJECT_NAME_INVALID;
 
     unix_len = name_len * 3 + MAX_DIR_ENTRY_LEN + 3;
     if (!(unix_name = RtlAllocateHeap( GetProcessHeap(), 0, unix_len )))
@@ -2773,7 +2773,7 @@ NTSTATUS CDECL wine_nt_to_unix_file_name( const UNICODE_STRING *nameW, ANSI_STRI
     for (pos = 0; pos < name_len; pos++)
     {
         if (IS_SEPARATOR(name[pos])) break;
-        if (name[pos] < 32 || strchrW( invalid_charsW, name[pos] ))
+        if (name[pos] < 32 || wcschr( invalid_charsW, name[pos] ))
             return STATUS_OBJECT_NAME_INVALID;
     }
     if (pos > MAX_DIR_ENTRY_LEN)
@@ -2801,7 +2801,7 @@ NTSTATUS CDECL wine_nt_to_unix_file_name( const UNICODE_STRING *nameW, ANSI_STRI
     else
     {
         for (p = name; p < name + name_len; p++)
-            if (*p < 32 || strchrW( invalid_charsW, *p )) return STATUS_OBJECT_NAME_INVALID;
+            if (*p < 32 || wcschr( invalid_charsW, *p )) return STATUS_OBJECT_NAME_INVALID;
     }
 
     unix_len = (prefix_len + name_len) * 3 + MAX_DIR_ENTRY_LEN + 3;
diff --git a/dlls/ntdll/env.c b/dlls/ntdll/env.c
index f587bdef7e4..59066e00304 100644
--- a/dlls/ntdll/env.c
+++ b/dlls/ntdll/env.c
@@ -681,13 +681,13 @@ static void get_image_path( const char *argv0, UNICODE_STRING *path )
     ntdll_umbstowcs( argv0, len, name, len );
 
     if (RtlDetermineDosPathNameType_U( name ) != RELATIVE_PATH ||
-        strchrW( name, '/' ) || strchrW( name, '\\' ))
+        wcschr( name, '/' ) || wcschr( name, '\\' ))
     {
         len = RtlGetFullPathName_U( name, sizeof(full_name), full_name, &file_part );
         if (!len || len > sizeof(full_name)) goto failed;
         /* try first without extension */
         if (RtlDoesFileExists_U( full_name )) goto done;
-        if (len < (MAX_PATH - 4) * sizeof(WCHAR) && !strchrW( file_part, '.' ))
+        if (len < (MAX_PATH - 4) * sizeof(WCHAR) && !wcschr( file_part, '.' ))
         {
             wcscat( file_part, exeW );
             if (RtlDoesFileExists_U( full_name )) goto done;
@@ -711,7 +711,7 @@ static void get_image_path( const char *argv0, UNICODE_STRING *path )
             if (strlenW( name ) >= MAX_PATH - 4 - len) goto failed;
             wcscpy( full_name, system_dir );
             wcscat( full_name, name );
-            if (!strchrW( name, '.' )) wcscat( full_name, exeW );
+            if (!wcschr( name, '.' )) wcscat( full_name, exeW );
         }
     }
 done:
@@ -809,8 +809,8 @@ static void build_command_line( WCHAR **argv, UNICODE_STRING *cmdline )
 
         /* check for quotes and spaces in this argument */
         if (arg == argv || !**arg) has_space = TRUE;
-        else has_space = strchrW( *arg, ' ' ) || strchrW( *arg, '\t' );
-        has_quote = strchrW( *arg, '"' ) != NULL;
+        else has_space = wcschr( *arg, ' ' ) || wcschr( *arg, '\t' );
+        has_quote = wcschr( *arg, '"' ) != NULL;
 
         /* now transfer it to the command line */
         if (has_space) *p++ = '"';
@@ -912,7 +912,7 @@ static LPCWSTR ENV_FindVariable(PCWSTR var, PCWSTR name, unsigned namelen)
         if (len > namelen &&
             var[namelen] == '=' &&
             !RtlCompareUnicodeStrings( var, namelen, name, namelen, TRUE ) &&
-            strchrW(var + 1, '=') == var + namelen)
+            wcschr(var + 1, '=') == var + namelen)
         {
             return var + namelen + 1;
         }
diff --git a/dlls/ntdll/loader.c b/dlls/ntdll/loader.c
index da19e74a76d..7f2a1ac109d 100644
--- a/dlls/ntdll/loader.c
+++ b/dlls/ntdll/loader.c
@@ -182,7 +182,7 @@ static inline void *get_rva( HMODULE module, DWORD va )
 /* check whether the file name contains a path */
 static inline BOOL contains_path( LPCWSTR name )
 {
-    return ((*name && (name[1] == ':')) || strchrW(name, '/') || strchrW(name, '\\'));
+    return ((*name && (name[1] == ':')) || wcschr(name, '/') || wcschr(name, '\\'));
 }
 
 #define RTL_UNLOAD_EVENT_TRACE_NUMBER 64
@@ -608,7 +608,7 @@ static FARPROC find_forwarded_export( HMODULE module, const char *forward, LPCWS
     if ((end - forward) * sizeof(WCHAR) >= sizeof(mod_name)) return NULL;
     ascii_to_unicode( mod_name, forward, end - forward );
     mod_name[end - forward] = 0;
-    if (!strchrW( mod_name, '.' ))
+    if (!wcschr( mod_name, '.' ))
     {
         if ((end - forward) * sizeof(WCHAR) >= sizeof(mod_name) - sizeof(dllW)) return NULL;
         memcpy( mod_name + (end - forward), dllW, sizeof(dllW) );
@@ -2890,7 +2890,7 @@ static NTSTATUS find_dll_file( const WCHAR *load_path, const WCHAR *libname, con
 
     if (default_ext)  /* first append default extension */
     {
-        if (!(ext = strrchrW( libname, '.')) || strchrW( ext, '/' ) || strchrW( ext, '\\'))
+        if (!(ext = strrchrW( libname, '.')) || wcschr( ext, '/' ) || wcschr( ext, '\\'))
         {
             if (!(dllname = RtlAllocateHeap( GetProcessHeap(), 0,
                                              (strlenW(libname)+strlenW(default_ext)+1) * sizeof(WCHAR))))
@@ -4162,7 +4162,7 @@ NTSTATUS WINAPI RtlGetExePath( PCWSTR name, PWSTR *path )
     const WCHAR *module = NtCurrentTeb()->Peb->ProcessParameters->ImagePathName.Buffer;
 
     /* same check as NeedCurrentDirectoryForExePathW */
-    if (!strchrW( name, '\\' ))
+    if (!wcschr( name, '\\' ))
     {
         static const WCHAR env_name[] = {'N','o','D','e','f','a','u','l','t','C','u','r','r','e','n','t',
                                          'D','i','r','e','c','t','o','r','y','I','n',
diff --git a/dlls/ntdll/loadorder.c b/dlls/ntdll/loadorder.c
index 1a3c579deee..9d3364aa28c 100644
--- a/dlls/ntdll/loadorder.c
+++ b/dlls/ntdll/loadorder.c
@@ -199,7 +199,7 @@ static void add_load_order( const module_loadorder_t *plo )
 static void add_load_order_set( WCHAR *entry )
 {
     module_loadorder_t ldo;
-    WCHAR *end = strchrW( entry, '=' );
+    WCHAR *end = wcschr( entry, '=' );
 
     if (!end) return;
     *end++ = 0;
@@ -253,7 +253,7 @@ static void init_load_order(void)
     {
         while (*entry == ';') entry++;
         if (!*entry) break;
-        next = strchrW( entry, ';' );
+        next = wcschr( entry, ';' );
         if (next) *next++ = 0;
         else next = entry + strlenW(entry);
         add_load_order_set( entry );
@@ -449,7 +449,7 @@ enum loadorder get_load_order( const WCHAR *app_name, const UNICODE_STRING *nt_n
     {
         const WCHAR *p = path + strlenW( system_dir );
         while (*p == '\\' || *p == '/') p++;
-        if (!strchrW( p, '\\' ) && !strchrW( p, '/' )) path = p;
+        if (!wcschr( p, '\\' ) && !wcschr( p, '/' )) path = p;
     }
 
     if (!(len = strlenW(path))) return ret;
diff --git a/dlls/ntdll/locale.c b/dlls/ntdll/locale.c
index 88cfb08a6b0..6e885b0b2c4 100644
--- a/dlls/ntdll/locale.c
+++ b/dlls/ntdll/locale.c
@@ -863,7 +863,7 @@ static LCID unix_locale_to_lcid( const char *unix_name )
         {
             *p++ = 0;
             /* charset, ignore */
-            p = strchrW( p, '@' );
+            p = wcschr( p, '@' );
         }
         if (p)
         {
@@ -1723,7 +1723,7 @@ NTSTATUS WINAPI RtlLocaleNameToLcid( const WCHAR *name, LCID *lcid, ULONG flags
             while (*p)
             {
                 if (!wcsnicmp( p, script, len ) && (!p[len] || p[len] == ';')) break;
-                if (!(p = strchrW( p, ';'))) break;
+                if (!(p = wcschr( p, ';'))) break;
                 p++;
             }
             if (!p || !*p) continue;
diff --git a/dlls/ntdll/ntdll_misc.h b/dlls/ntdll/ntdll_misc.h
index 2a32660e72a..ca8d26ca82b 100644
--- a/dlls/ntdll/ntdll_misc.h
+++ b/dlls/ntdll/ntdll_misc.h
@@ -304,6 +304,7 @@ int    WINAPIV NTDLL_swprintf( WCHAR *str, const WCHAR *format, ... );
 #define wcsupr(s) NTDLL__wcsupr(s)
 #define wcscpy(d,s) NTDLL_wcscpy(d,s)
 #define wcscat(d,s) NTDLL_wcscat(d,s)
+#define wcschr(s,c) NTDLL_wcschr(s,c)
 #define wcstoul(s,e,b) NTDLL_wcstoul(s,e,b)
 
 /* convert from straight ASCII to Unicode without depending on the current codepage */
diff --git a/dlls/ntdll/path.c b/dlls/ntdll/path.c
index 16661661814..feb50726f4b 100644
--- a/dlls/ntdll/path.c
+++ b/dlls/ntdll/path.c
@@ -488,7 +488,7 @@ ULONG WINAPI RtlDosSearchPath_U(LPCWSTR paths, LPCWSTR search, LPCWSTR ext,
         filelen = 1 /* for \ */ + strlenW(search) + 1 /* \0 */;
 
         /* Windows only checks for '.' without worrying about path components */
-        if (strchrW( search, '.' )) ext = NULL;
+        if (wcschr( search, '.' )) ext = NULL;
         if (ext != NULL) filelen += strlenW(ext);
 
         while (*paths)
diff --git a/dlls/ntdll/printf.c b/dlls/ntdll/printf.c
index d5b197396ad..1e3447815f5 100644
--- a/dlls/ntdll/printf.c
+++ b/dlls/ntdll/printf.c
@@ -454,7 +454,7 @@ static int pf_vsnprintf( pf_output *out, const WCHAR *format, __ms_va_list valis
 
     while (*p)
     {
-        q = strchrW( p, '%' );
+        q = wcschr( p, '%' );
 
         /* there are no % characters left: output the rest of the string */
         if( !q )
diff --git a/dlls/ntdll/relay.c b/dlls/ntdll/relay.c
index 1e4d8054053..278e17dc218 100644
--- a/dlls/ntdll/relay.c
+++ b/dlls/ntdll/relay.c
@@ -104,7 +104,7 @@ static const WCHAR **build_list( const WCHAR *buffer )
     const WCHAR *p = buffer;
     const WCHAR **ret;
 
-    while ((p = strchrW( p, ';' )))
+    while ((p = wcschr( p, ';' )))
     {
         count++;
         p++;
@@ -121,7 +121,7 @@ static const WCHAR **build_list( const WCHAR *buffer )
         for (;;)
         {
             ret[count++] = q;
-            if (!(q = strchrW( q, ';' ))) break;
+            if (!(q = wcschr( q, ';' ))) break;
             *q++ = 0;
         }
         ret[count++] = NULL;
diff --git a/dlls/ntdll/rtlstr.c b/dlls/ntdll/rtlstr.c
index aa842f258ec..fdbc9739d57 100644
--- a/dlls/ntdll/rtlstr.c
+++ b/dlls/ntdll/rtlstr.c
@@ -1228,7 +1228,7 @@ BOOLEAN WINAPI RtlIsTextUnicode( LPCVOID buf, INT len, INT *pf )
     {
         for (i = 0; i < len; i++)
         {
-            if (strchrW(std_control_chars, s[i]))
+            if (wcschr(std_control_chars, s[i]))
             {
                 out_flags |= IS_TEXT_UNICODE_CONTROLS;
                 break;
@@ -1240,7 +1240,7 @@ BOOLEAN WINAPI RtlIsTextUnicode( LPCVOID buf, INT len, INT *pf )
     {
         for (i = 0; i < len; i++)
         {
-            if (strchrW(byterev_control_chars, s[i]))
+            if (wcschr(byterev_control_chars, s[i]))
             {
                 out_flags |= IS_TEXT_UNICODE_REVERSE_CONTROLS;
                 break;
diff --git a/dlls/ntdll/version.c b/dlls/ntdll/version.c
index 87765d55623..803973c06ec 100644
--- a/dlls/ntdll/version.c
+++ b/dlls/ntdll/version.c
@@ -281,7 +281,7 @@ static BOOL get_nt_registry_version( RTL_OSVERSIONINFOEXW *version )
     {
         WCHAR *p, *str = (WCHAR *)info->Data;
         str[info->DataLength / sizeof(WCHAR)] = 0;
-        p = strchrW( str, '.' );
+        p = wcschr( str, '.' );
         if (p)
         {
             *p++ = 0;
@@ -398,13 +398,13 @@ static BOOL get_win9x_registry_version( RTL_OSVERSIONINFOEXW *version )
     {
         WCHAR *p, *str = (WCHAR *)info->Data;
         str[info->DataLength / sizeof(WCHAR)] = 0;
-        p = strchrW( str, '.' );
+        p = wcschr( str, '.' );
         if (p) *p++ = 0;
         version->dwMajorVersion = wcstoul( str, NULL, 10 );
         if (p)
         {
             str = p;
-            p = strchrW( str, '.' );
+            p = wcschr( str, '.' );
             if (p)
             {
                 *p++ = 0;