diff --git a/platform/osx/src/MGLMapView.mm b/platform/osx/src/MGLMapView.mm
index 0ccf93ba8..39fcb3245 100644
--- a/platform/osx/src/MGLMapView.mm
+++ b/platform/osx/src/MGLMapView.mm
@@ -233,7 +233,7 @@ public:
 }
 
 + (NSArray *)restorableStateKeyPaths {
-    return @[@"camera"];
+    return @[@"camera", @"debugMask"];
 }
 
 - (void)commonInit {