diff --git a/src/map.c b/src/map.c
index 30cbb22..ed87c97 100644
--- a/src/map.c
+++ b/src/map.c
@@ -420,9 +420,9 @@ static void map_mouse(unsigned int wid, SDL_Event* event, double mx, double my)
   switch(event->type) {
   case SDL_MOUSEBUTTONDOWN:
     if(event->button.button == SDL_BUTTON_WHEELUP)
-      map_buttonZoom(0, "btnZoomOut");
-    else if(event->button.button == SDL_BUTTON_WHEELDOWN)
       map_buttonZoom(0, "btnZoomIn");
+    else if(event->button.button == SDL_BUTTON_WHEELDOWN)
+      map_buttonZoom(0, "btnZoomOut");
 
     /* Selecting star system. */
     else {