diff --git a/src/compile/mark/mark.ts b/src/compile/mark/mark.ts
index 009d974753..cf821cb509 100644
--- a/src/compile/mark/mark.ts
+++ b/src/compile/mark/mark.ts
@@ -376,7 +376,7 @@ function interactiveFlag(model: UnitModel) {
   }
   return parentCount
     ? {
-        interactive: unitCount > 0 || model.mark === 'geoshape' || !!model.encoding.tooltip
+        interactive: unitCount > 0 || model.mark === 'geoshape' || !!model.encoding.tooltip || !!model.markDef.tooltip
       }
     : null;
 }