diff --git a/src/extensions/scratch3_gdx_for/index.js b/src/extensions/scratch3_gdx_for/index.js
index 5520dccb1..066e3d1ac 100644
--- a/src/extensions/scratch3_gdx_for/index.js
+++ b/src/extensions/scratch3_gdx_for/index.js
@@ -617,7 +617,7 @@ class Scratch3GdxForBlocks {
         }
     }
     whenJumped () {
-        return this.isFreeFalling;
+        return this.isFreeFalling();
     }
     whenSpinSpeedCompare (args) {
         const currentVal = this.magnitude(