diff --git a/AngleUsing.h b/AngleUsing.h
index d6eb4d0..156fd6e 100644
--- a/AngleUsing.h
+++ b/AngleUsing.h
@@ -14,7 +14,7 @@ public:
   inline T GetValue() const { return this->value; }
 
   AngleUsing<T> operator+(const AngleUsing<T> a) {
-    AngleUsing<T> r = AngleUsing(this->value + a.value);
+    AngleUsing<T> r = AngleUsing((float)this->value + a.value);
     return r;
   }