diff --git a/dlls/ntdll/nt.c b/dlls/ntdll/nt.c
index 0a599470c91..f429349698b 100644
--- a/dlls/ntdll/nt.c
+++ b/dlls/ntdll/nt.c
@@ -1200,19 +1200,19 @@ static inline void get_cpuinfo(SYSTEM_CPU_INFORMATION* info)
             while (isspace(*value)) value++;
             if ((s = strchr(value,'\n')))
                 *s='\0';
-            if (!strcasecmp(line, "CPU architecture"))
+            if (!_stricmp(line, "CPU architecture"))
             {
                 if (isdigit(value[0]))
                     info->Level = atoi(value);
                 continue;
             }
-            if (!strcasecmp(line, "CPU revision"))
+            if (!_stricmp(line, "CPU revision"))
             {
                 if (isdigit(value[0]))
                     info->Revision = atoi(value);
                 continue;
             }
-            if (!strcasecmp(line, "features"))
+            if (!_stricmp(line, "features"))
             {
                 if (strstr(value, "vfpv3"))
                     user_shared_data->ProcessorFeatures[PF_ARM_VFP_32_REGISTERS_AVAILABLE] = TRUE;
@@ -1268,19 +1268,19 @@ static inline void get_cpuinfo(SYSTEM_CPU_INFORMATION* info)
             while (isspace(*value)) value++;
             if ((s = strchr(value,'\n')))
                 *s='\0';
-            if (!strcasecmp(line, "CPU architecture"))
+            if (!_stricmp(line, "CPU architecture"))
             {
                 if (isdigit(value[0]))
                     info->Level = atoi(value);
                 continue;
             }
-            if (!strcasecmp(line, "CPU revision"))
+            if (!_stricmp(line, "CPU revision"))
             {
                 if (isdigit(value[0]))
                     info->Revision = atoi(value);
                 continue;
             }
-            if (!strcasecmp(line, "Features"))
+            if (!_stricmp(line, "Features"))
             {
                 if (strstr(value, "crc32"))
                     user_shared_data->ProcessorFeatures[PF_ARM_V8_CRC32_INSTRUCTIONS_AVAILABLE] = TRUE;
@@ -2927,7 +2927,7 @@ static ULONG mhz_from_cpuinfo(void)
             while ((s >= line) && isspace(*s)) s--;
             *(s + 1) = '\0';
             value++;
-            if (!strcasecmp(line, "cpu MHz")) {
+            if (!_stricmp(line, "cpu MHz")) {
                 sscanf(value, " %lf", &cmz);
                 break;
             }
diff --git a/dlls/ntdll/ntdll_misc.h b/dlls/ntdll/ntdll_misc.h
index 2692c432242..e188907283c 100644
--- a/dlls/ntdll/ntdll_misc.h
+++ b/dlls/ntdll/ntdll_misc.h
@@ -257,4 +257,6 @@ extern SYSTEM_CPU_INFORMATION cpu_info DECLSPEC_HIDDEN;
 NTSTATUS WINAPI RtlHashUnicodeString(PCUNICODE_STRING,BOOLEAN,ULONG,ULONG*);
 void     WINAPI LdrInitializeThunk(CONTEXT*,void**,ULONG_PTR,ULONG_PTR);
 
+/* string functions */
+int __cdecl _stricmp( LPCSTR str1, LPCSTR str2 );
 #endif
diff --git a/dlls/ntdll/relay.c b/dlls/ntdll/relay.c
index a205086435a..7974587c4a7 100644
--- a/dlls/ntdll/relay.c
+++ b/dlls/ntdll/relay.c
@@ -889,7 +889,7 @@ void RELAY_SetupDLL( HMODULE module )
     data->module = module;
     data->base   = exports->Base;
     len = strlen( (char *)module + exports->Name );
-    if (len > 4 && !strcasecmp( (char *)module + exports->Name + len - 4, ".dll" )) len -= 4;
+    if (len > 4 && !_stricmp( (char *)module + exports->Name + len - 4, ".dll" )) len -= 4;
     len = min( len, sizeof(data->dllname) - 1 );
     memcpy( data->dllname, (char *)module + exports->Name, len );
     data->dllname[len] = 0;
@@ -1054,7 +1054,7 @@ void SNOOP_SetupDLL(HMODULE hmod)
     (*dll)->nrofordinals = exports->NumberOfFunctions;
     strcpy( (*dll)->name, name );
     p = (*dll)->name + strlen((*dll)->name) - 4;
-    if (p > (*dll)->name && !strcasecmp( p, ".dll" )) *p = 0;
+    if (p > (*dll)->name && !_stricmp( p, ".dll" )) *p = 0;
 
     size = exports->NumberOfFunctions * sizeof(SNOOP_FUN);
     addr = NULL;