diff --git a/newgrf_text.c b/newgrf_text.c
--- a/newgrf_text.c
+++ b/newgrf_text.c
@@ -305,7 +305,7 @@ char *GetGRFString(char *buff, uint16 st
 	/*Search the list of lang-strings of this stringid for current lang */
 	for (search_text = _grf_text[stringid].textholder; search_text != NULL; search_text = search_text->next) {
 		if (search_text->langid == _currentLangID) {
-			return strecpy(buff, search_text->text, NULL);
+			return strecpy(buff, search_text->text, last);
 		}
 
 		/* If the current string is English or American, set it as the
@@ -316,7 +316,7 @@ char *GetGRFString(char *buff, uint16 st
 	}
 
 	/* If there is a fallback string, return that */
-	if (default_text != NULL) return strecpy(buff, default_text->text, NULL);
+	if (default_text != NULL) return strecpy(buff, default_text->text, last);
 
 	/* Use the default string ID if the fallback string isn't available */
 	return GetString(buff, _grf_text[stringid].def_string, last);