diff --git a/gdb/expread.y b/gdb/expread.y
index d05383fdd9..cc62554102 100755
--- a/gdb/expread.y
+++ b/gdb/expread.y
@@ -1627,6 +1627,7 @@ yylex ()
   }
 }
 
+/* ARGSUSED */
 static void
 yyerror (msg)
      char *msg;