diff --git a/core/src/com/unciv/MainMenuScreen.kt b/core/src/com/unciv/MainMenuScreen.kt
index 6a60fe93b5..0edb25e090 100644
--- a/core/src/com/unciv/MainMenuScreen.kt
+++ b/core/src/com/unciv/MainMenuScreen.kt
@@ -41,6 +41,11 @@ class MainMenuScreen: CameraStageBaseScreen() {
         stage.addActor(backgroundTable)
         backgroundTable.center(stage)
 
+        // If we were in a mod, some of the resource images for the background map we're creating
+        // will not exist unless we reset the ruleset and images
+        ImageGetter.ruleset = RulesetCache.getBaseRuleset()
+        ImageGetter.refreshAtlas()
+
         thread(name="ShowMapBackground") {
             val newMap = MapGenerator(RulesetCache.getBaseRuleset())
                     .generateMap(MapParameters().apply { size = MapSize.Small; type=MapType.default })