diff --git a/nodecomment.module b/nodecomment.module
index 9ccdfdf..983d1ad 100644
--- a/nodecomment.module
+++ b/nodecomment.module
@@ -1223,8 +1223,13 @@ function nodecomment_get_comment_type($node_type) {
  */
 function nodecomment_get_comment_types() {
   foreach (node_get_types('names') as $type => $blank) {
+    
+    // Does this content type specify a comment type?
     $comment_type = nodecomment_get_comment_type($type);
-    $comment_types[$comment_type] = $comment_type;
+    if (!empty($comment_type)) {
+      // Yes, add it to our returned array
+      $comment_types[$comment_type] = $comment_type;
+    }
   }
   return $comment_types;
 }