diff --git a/source/blender/blenlib/intern/math_base_inline.c b/source/blender/blenlib/intern/math_base_inline.c
index e228e25c4d6..3b11ea3dbcb 100644
--- a/source/blender/blenlib/intern/math_base_inline.c
+++ b/source/blender/blenlib/intern/math_base_inline.c
@@ -104,7 +104,7 @@ MINLINE float interpf(float target, float origin, float fac)
  * the distance gets very high, 180d would be inf, but this case isn't valid */
 MINLINE float shell_angle_to_dist(const float angle)
 {
-	return (angle < SMALL_NUMBER) ? 1.0f : fabsf(1.0f / cosf(angle * (M_PI/180.0f)));
+	return (angle < SMALL_NUMBER) ? 1.0f : fabsf(1.0f / cosf(angle));
 }
 
 /* used for zoom values*/