diff --git a/intern/bsp/intern/BOP_CarveInterface.cpp b/intern/bsp/intern/BOP_CarveInterface.cpp
index 255d885007c..1f9c989cbc8 100644
--- a/intern/bsp/intern/BOP_CarveInterface.cpp
+++ b/intern/bsp/intern/BOP_CarveInterface.cpp
@@ -58,7 +58,7 @@ static bool isQuadPlanar(carve::geom3d::Vector &v1, carve::geom3d::Vector &v2,
 	cross = carve::geom::cross(vec1, vec2);
 
 	float production = carve::geom::dot(cross, vec3);
-	float magnitude = 1e-6 * cross.length();
+	float magnitude = 1e-5 * cross.length();
 
 	return fabs(production) < magnitude;
 }