diff --git a/src/form-builder-controls.js b/src/form-builder-controls.js
index b9c6fb2d4..d0d4d3f63 100755
--- a/src/form-builder-controls.js
+++ b/src/form-builder-controls.js
@@ -481,6 +481,15 @@ export default [
           jsonData: '',
         },
         form: '',
+        source: {
+          collectionFields: [],
+          collectionFieldsColumns: [],
+          pmql: null,
+          sourceOptions: "Variable",
+          variableStore: null,
+          dataSelectionOptions: "no-selection",
+          singleField: null
+        }
       },
       inspector: [
         keyNameProperty,