1 files changed, 1 insertions, 1 deletions
diff --git a/src/map.h b/src/map.h
index 44dd6f2c1..77689803f 100644
--- a/src/map.h
+++ b/src/map.h
@@ -85,7 +85,7 @@ struct MetaTile final
 class TileAnimation final
 {
     public:
-        TileAnimation(Animation *const ani);
+        explicit TileAnimation(Animation *const ani);
 
         ~TileAnimation();