diff --git a/irr/include/plane3d.h b/irr/include/plane3d.h
index 4003325b5..506b5ecbb 100644
--- a/irr/include/plane3d.h
+++ b/irr/include/plane3d.h
@@ -165,7 +165,7 @@ public:
 	bool existsIntersection(const plane3d<T> &other) const
 	{
 		vector3d<T> cross = other.Normal.crossProduct(Normal);
-		return cross.getLength() > core::ROUNDING_ERROR_f32;
+		return cross.getLength() > ROUNDING_ERROR_f32;
 	}
 
 	//! Intersects this plane with another.