diff --git a/packages/node_modules/@node-red/editor-client/src/js/ui/subflow.js b/packages/node_modules/@node-red/editor-client/src/js/ui/subflow.js
index f787c5375..88a42063f 100644
--- a/packages/node_modules/@node-red/editor-client/src/js/ui/subflow.js
+++ b/packages/node_modules/@node-red/editor-client/src/js/ui/subflow.js
@@ -1438,7 +1438,8 @@ RED.subflow = (function() {
 
         }).on("change", function(evt,type) {
             if (ui.type === 'input') {
-                ui.opts.types = inputCellInput.typedInput('value').split(",");
+                var types = inputCellInput.typedInput('value');
+                ui.opts.types = (types === "") ? ["str"] : types.split(",");
                 valueField.typedInput('types',ui.opts.types);
             }
         });