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 8e2bdf453..ed7cf134c 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
@@ -1668,7 +1668,7 @@ RED.subflow = (function() {
     }
 
     function getSubflowEnvPropertyName(name) {
-        return 'node-input-subflow-env-'+name.replace(/\s/g,"_");
+        return 'node-input-subflow-env-'+name.replace(/[^a-z0-9-_]/ig,"_");
     }
 
     /**