diff --git a/contrib/poly2tri/poly2tri/common/shapes.h b/contrib/poly2tri/poly2tri/common/shapes.h
index 472412154..d63f6a5be 100644
--- a/contrib/poly2tri/poly2tri/common/shapes.h
+++ b/contrib/poly2tri/poly2tri/common/shapes.h
@@ -257,7 +257,7 @@ inline bool operator ==(const Point& a, const Point& b)
 
 inline bool operator !=(const Point& a, const Point& b)
 {
-  return a.x != b.x && a.y != b.y;
+  return a.x != b.x || a.y != b.y;
 }
 
 /// Peform the dot product on two vectors.