diff --git a/source/src/serverfiles.h b/source/src/serverfiles.h
index 2744b790..cdfc98f0 100644
--- a/source/src/serverfiles.h
+++ b/source/src/serverfiles.h
@@ -135,7 +135,7 @@ struct servermapbuffer  // sending of maps between clients
 // provide maps by the server
 
 enum { MAP_NOTFOUND = 0, MAP_TEMP, MAP_CUSTOM, MAP_LOCAL, MAP_OFFICIAL, MAP_VOID };
-const char *maplocstr[] = { "not found", "temporary", "custom", "local", "official", "void" };
+const char * const maplocstr[] = { "not found", "temporary", "custom", "local", "official", "void" };
 #define readonlymap(x) ((x) >= MAP_CUSTOM)
 #define distributablemap(x) ((x) == MAP_TEMP || (x) == MAP_CUSTOM)
 
@@ -967,4 +967,4 @@ struct killmessagesfile : serverconfigfile
 			}
 		}
 	}
-};
\ No newline at end of file
+};