diff --git a/poly2tri/common/shapes.h b/poly2tri/common/shapes.h
index 1b0a79e..54b9337 100644
--- a/poly2tri/common/shapes.h
+++ b/poly2tri/common/shapes.h
@@ -259,7 +259,7 @@ 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.