diff --git a/src/overworld.c b/src/overworld.c
index cd1a1df966..0ac310e653 100644
--- a/src/overworld.c
+++ b/src/overworld.c
@@ -1481,7 +1481,8 @@ u8 UpdateTimeOfDay(void) {
 }
 
 static bool8 MapHasNaturalLight(u8 mapType) { // Weather a map type is naturally lit/outside
-  return mapType == MAP_TYPE_TOWN || mapType == MAP_TYPE_CITY || mapType == MAP_TYPE_ROUTE;
+  return mapType == MAP_TYPE_TOWN || mapType == MAP_TYPE_CITY || mapType == MAP_TYPE_ROUTE
+      || mapType == MAP_TYPE_OCEAN_ROUTE;
 }
 
 static bool8 FadePalettesWithTime(void) {