diff --git a/source/blender/nodes/intern/node_common.cc b/source/blender/nodes/intern/node_common.cc
index f58b102ed3e..8491dcc8e08 100644
--- a/source/blender/nodes/intern/node_common.cc
+++ b/source/blender/nodes/intern/node_common.cc
@@ -102,7 +102,9 @@ bool nodeGroupPoll(const bNodeTree *nodetree,
     return false;
   }
   if (nodetree->type != grouptree->type) {
-    *r_disabled_hint = TIP_("Node group has different type");
+    if (r_disabled_hint) {
+      *r_disabled_hint = TIP_("Node group has different type");
+    }
     return false;
   }