diff --git a/glm/gtx/easing.inl b/glm/gtx/easing.inl
index 4b7d05b71..b599c3066 100644
--- a/glm/gtx/easing.inl
+++ b/glm/gtx/easing.inl
@@ -425,7 +425,7 @@ namespace glm{
 
 		if(a < static_cast<genType>(0.5))
 		{
-			return static_cast<genType>(0.5) * (one<genType>() - bounceEaseOut(a * static_cast<genType>(2)));
+			return static_cast<genType>(0.5) * (one<genType>() - bounceEaseOut(one<genType>() - a * static_cast<genType>(2)));
 		}
 		else
 		{