diff --git a/ui/effects/animation_value.h b/ui/effects/animation_value.h
index 3cc0ec2..dee83eb 100644
--- a/ui/effects/animation_value.h
+++ b/ui/effects/animation_value.h
@@ -14,16 +14,21 @@
 
 namespace anim {
 
-enum class type {
+enum class type : uchar {
 	normal,
 	instant,
 };
 
-enum class activation {
+enum class activation : uchar {
 	normal,
 	background,
 };
 
+enum class repeat : uchar {
+	loop,
+	once,
+};
+
 using transition = Fn<float64(float64 delta, float64 dt)>;
 
 extern transition linear;
diff --git a/ui/layers/box_layer_widget.h b/ui/layers/box_layer_widget.h
index 05cfd13..b1f1fce 100644
--- a/ui/layers/box_layer_widget.h
+++ b/ui/layers/box_layer_widget.h
@@ -17,7 +17,7 @@ class Painter;
 struct TextWithEntities;
 
 namespace anim {
-enum class type;
+enum class type : uchar;
 } // namespace anim
 
 namespace style {