diff --git a/include/maskfld.cpp b/include/maskfld.cpp
index b02ae43de..8a32db03a 100755
--- a/include/maskfld.cpp
+++ b/include/maskfld.cpp
@@ -1,4 +1,4 @@
-//      $Id: maskfld.cpp,v 1.30 1994-10-14 19:15:06 guy Exp $
+//      $Id: maskfld.cpp,v 1.31 1994-10-19 11:46:18 alex Exp $
 #include <xvt.h>
 
 #include <applicat.h>
@@ -1124,17 +1124,23 @@ void TBrowse::parse_join(TScanner& scanner)
 
 void TBrowse::parse_insert(TScanner& scanner)
 {
-  if (scanner.popkey() == "RU")
-  {
-    _insert = "R";
-    _insert << scanner.line();
-  }
+  const TString16 key(scanner.popkey());
+
+  if (key == "NO") _insert = "";
   else
   {
-    _insert = "M";
-    _insert << scanner.line();
+    if (key == "RU")
+    {
+      _insert = "R";
+      _insert << scanner.line();
+    }
+    else
+    {
+      _insert = "M";
+      _insert << scanner.line();
+    }
+    _insert.trim();
   }
-  _insert.trim();
 }