diff --git a/libs/wine/debug.c b/libs/wine/debug.c
index d965983059f..7419cb216bd 100644
--- a/libs/wine/debug.c
+++ b/libs/wine/debug.c
@@ -143,12 +143,13 @@ void wine_dbg_add_option( const char *name, unsigned char set, unsigned char cle
 /* parse a set of debugging option specifications and add them to the option list */
 int wine_dbg_parse_options( const char *str )
 {
-    char *p, *opt, *next, *options;
+    char *opt, *next, *options;
     int i, errors = 0;
 
     if (!(options = strdup(str))) return -1;
     for (opt = options; opt; opt = next)
     {
+        const char *p;
         unsigned char set = 0, clear = 0;
 
         if ((next = strchr( opt, ',' ))) *next++ = 0;
diff --git a/tools/fnt2bdf.c b/tools/fnt2bdf.c
index f0f2d467e36..4a6bd16ae3d 100644
--- a/tools/fnt2bdf.c
+++ b/tools/fnt2bdf.c
@@ -58,13 +58,13 @@ char*	g_lpstrCharSet = NULL;
 char*   g_lpstrInputFile = NULL;
 int     g_outputPoints = 0;
 
-static char*	errorDLLRead = "Unable to read Windows DLL.\n";
-static char*    errorFNTRead = "Unable to read .FNT file.\n";
-static char*    errorOpenFile = "Unable to open file.\n";
-static char*    errorMemory = "Memory allocation error.\n";
-static char*    errorFile = "Corrupt or invalid file.\n";
-static char*    errorFontData = "Unable to parse font data: Error ";
-static char*    errorEmpty = "No fonts found.\n";
+static const char*  errorDLLRead = "Unable to read Windows DLL.\n";
+static const char*  errorFNTRead = "Unable to read .FNT file.\n";
+static const char*  errorOpenFile = "Unable to open file.\n";
+static const char*  errorMemory = "Memory allocation error.\n";
+static const char*  errorFile = "Corrupt or invalid file.\n";
+static const char*  errorFontData = "Unable to parse font data: Error ";
+static const char*  errorEmpty = "No fonts found.\n";
 
 /* info */
 
diff --git a/tools/winebuild/build.h b/tools/winebuild/build.h
index 1d12695742b..ec350df36c7 100644
--- a/tools/winebuild/build.h
+++ b/tools/winebuild/build.h
@@ -191,7 +191,7 @@ extern int kill_at;
 extern char *owner_name;
 extern char *dll_name;
 extern char *dll_file_name;
-extern char *init_func;
+extern const char *init_func;
 extern char *input_file_name;
 extern const char *output_file_name;
 extern char **debug_channels;
diff --git a/tools/winebuild/main.c b/tools/winebuild/main.c
index 1729c5ec3f5..3ac191389ca 100644
--- a/tools/winebuild/main.c
+++ b/tools/winebuild/main.c
@@ -66,7 +66,7 @@ int debugging = 0;
 char *owner_name = NULL;
 char *dll_name = NULL;
 char *dll_file_name = NULL;
-char *init_func = NULL;
+const char *init_func = NULL;
 char **debug_channels = NULL;
 char **lib_path = NULL;
 
diff --git a/tools/winebuild/relay.c b/tools/winebuild/relay.c
index 4ca72850d4e..7d7272fc790 100644
--- a/tools/winebuild/relay.c
+++ b/tools/winebuild/relay.c
@@ -120,7 +120,7 @@ static void function_header( FILE *outfile, const char *name )
  */
 static void BuildCallFrom16Core( FILE *outfile, int reg_func, int thunk, int short_ret )
 {
-    char *name = thunk? "thunk" : reg_func? "regs" : short_ret? "word" : "long";
+    const char *name = thunk? "thunk" : reg_func? "regs" : short_ret? "word" : "long";
 
     /* Function header */
     if (thunk) function_header( outfile, "__wine_call_from_16_thunk" );
@@ -753,7 +753,7 @@ static void BuildRet16Func( FILE *outfile )
  */
 static void BuildCallTo32CBClient( FILE *outfile, BOOL isEx )
 {
-    char *name = isEx? "CBClientEx" : "CBClient";
+    const char *name = isEx? "CBClientEx" : "CBClient";
     int size = isEx? 24 : 12;
 
     /* Function header */
@@ -889,7 +889,7 @@ static void BuildCallTo32CBClient( FILE *outfile, BOOL isEx )
 
 static void BuildCallTo32CBClientRet( FILE *outfile, BOOL isEx )
 {
-    char *name = isEx? "CBClientEx" : "CBClient";
+    const char *name = isEx? "CBClientEx" : "CBClient";
 
     /* '16-bit' return stub */
 
diff --git a/tools/winebuild/spec16.c b/tools/winebuild/spec16.c
index eccff57985c..43188a85bf3 100644
--- a/tools/winebuild/spec16.c
+++ b/tools/winebuild/spec16.c
@@ -346,7 +346,7 @@ static void BuildCallFrom16Func( FILE *outfile, const char *profile, const char
     int usecdecl = 0;
     int varargs = 0;
     const char *args = profile + 7;
-    char *ret_type;
+    const char *ret_type;
 
     /* Parse function type */