--- src/CGarminDBMap.h.orig	2008-05-13 16:07:00
+++ src/CGarminDBMap.h	2023-12-07 02:10:31
@@ -75,7 +75,7 @@ class CGarminDBMap : public QObject
             quint8 level;
             bool useBaseMap;
 
-            bool operator==(const CGarminDBMap::map_level_t &ml) {
+            bool operator==(const CGarminDBMap::map_level_t &ml) const {
                 if (ml.bits != bits || ml.level != level || ml.useBaseMap != useBaseMap)
                     return false;
                 else