diff --git a/packages/node_modules/@node-red/nodes/core/common/20-inject.html b/packages/node_modules/@node-red/nodes/core/common/20-inject.html
index 8aa3dc7b2..b5ba345bd 100644
--- a/packages/node_modules/@node-red/nodes/core/common/20-inject.html
+++ b/packages/node_modules/@node-red/nodes/core/common/20-inject.html
@@ -580,7 +580,7 @@
             node.props= [];
             delete node.payloadType;
             delete node.payload;
-            delete node.topic;
+            node.topic = "";
             props.each(function(i) {
                 var prop = $(this);
                 var p = {