diff --git a/src/input.c b/src/input.c
index 7978444..7808448 100644
--- a/src/input.c
+++ b/src/input.c
@@ -53,5 +53,6 @@ end:
 	glm_quat_rotatev( p, axis[0], axis[0] );
 	glm_quat_rotatev( p, axis[1], axis[1] );
 	glm_quat_rotatev( p, axis[2], axis[2] );
+	glm_quat_normalize( q );
 	return q;
 }