diff --git a/src/strings_func.h b/src/strings_func.h
--- a/src/strings_func.h
+++ b/src/strings_func.h
@@ -124,7 +124,6 @@ public:
 };
 extern StringParameters _global_string_params;
 
-char *InlineString(char *buf, StringID string);
 char *GetString(char *buffr, StringID string, const char *last);
 char *GetStringWithArgs(char *buffr, StringID string, StringParameters *args, const char *last, uint case_index = 0, bool game_script = false);
 const char *GetStringPtr(StringID string);