diff --git a/ChangeLog.md b/ChangeLog.md
index 03a51ba76..6071937db 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -85,6 +85,7 @@ Nazara Engine:
 - Fixed Sound copy which was not copying looping state
 - Fixed Billboard bounding volume
 - Fixed Directory::GetResultSize and Directory::IsResultDirectory on Posix systems
+- Fixed Quaternion::Inverse which was not correctly normalizing quaternions
 
 Nazara Development Kit:
 - Added ImageWidget (#139)
diff --git a/include/Nazara/Math/Quaternion.inl b/include/Nazara/Math/Quaternion.inl
index e65be083a..59099f3b8 100644
--- a/include/Nazara/Math/Quaternion.inl
+++ b/include/Nazara/Math/Quaternion.inl
@@ -220,7 +220,7 @@ namespace Nz
 		T norm = SquaredMagnitude();
 		if (norm > F(0.0))
 		{
-			T invNorm = F(1.0) / norm;
+			T invNorm = F(1.0) / std::sqrt(norm);
 
 			w *= invNorm;
 			x *= -invNorm;