diff --git a/tools/qfcc/include/cmdlib.h b/tools/qfcc/include/cmdlib.h
index 0eb4feb8d..2fa9a85a1 100644
--- a/tools/qfcc/include/cmdlib.h
+++ b/tools/qfcc/include/cmdlib.h
@@ -49,7 +49,7 @@ extern char **myargv;
 
 int FileLength (FILE *f);
 
-void	Error (char *error, ...);
+void	Error (char *error, ...)__attribute__((format(printf, 1,2)));
 int		CheckParm (char *check);
 
 FILE	*SafeOpenWrite (char *filename);
diff --git a/tools/qfcc/include/qfcc.h b/tools/qfcc/include/qfcc.h
index f26fa8261..054e43186 100644
--- a/tools/qfcc/include/qfcc.h
+++ b/tools/qfcc/include/qfcc.h
@@ -436,7 +436,7 @@ def_t *PR_ReuseConstant (expr_t *expr, def_t *def);
 
 qboolean PR_Check (token_type_t type, const char *string);
 void PR_Expect (token_type_t type, const char *string);
-void PR_ParseError (const char *error, ...);
+void PR_ParseError (const char *error, ...)__attribute__((format(printf, 1,2)));
 
 
 extern	jmp_buf		pr_parse_abort;		// longjump with this on parse error