diff --git a/src/strings_func.h b/src/strings_func.h
--- a/src/strings_func.h
+++ b/src/strings_func.h
@@ -13,10 +13,11 @@
 #define STRINGS_FUNC_H
 
 #include "strings_type.h"
+#include "string_type.h"
 
 char *InlineString(char *buf, StringID string);
 char *GetString(char *buffr, StringID string, const char *last);
-char *GetStringWithArgs(char *buffr, uint string, int64 *argv, const int64 *argve, const char *last);
+char *GetStringWithArgs(char *buffr, uint string, int64 *argv, const int64 *argve, const char *last, WChar *argt = NULL);
 const char *GetStringPtr(StringID string);
 
 void InjectDParam(uint amount);