diff --git a/src/map/map.cpp b/src/map/map.cpp
index 47bfbeea80..2aece64f6f 100644
--- a/src/map/map.cpp
+++ b/src/map/map.cpp
@@ -2979,6 +2979,9 @@ const char* map_mapid2mapname(int m)
 
 	struct map_data *mapdata = map_getmapdata(m);
 
+	if (!mapdata)
+		return "";
+
 	if (mapdata->instance_id) { // Instance map check
 		struct instance_data *im = &instance_data[mapdata->instance_id];