diff --git a/sim/ChangeLog b/sim/ChangeLog
index 9ddee6482df..628e6a8b09f 100644
--- a/sim/ChangeLog
+++ b/sim/ChangeLog
@@ -1,3 +1,7 @@
+2015-02-02  Chen Gang <gang.chen.5i5j@gmail.com>
+
+	* mcore/interp.c (sim_do_command): Call freeargv() before return.
+
 2015-02-02  Chen Gang <gang.chen.5i5j@gmail.com>
 
 	* common/sim-options.c (sim_args_command): Call freeargv() when
diff --git a/sim/mcore/interp.c b/sim/mcore/interp.c
index d2edd126c3f..dfaa6aacbd0 100644
--- a/sim/mcore/interp.c
+++ b/sim/mcore/interp.c
@@ -2143,6 +2143,7 @@ sim_do_command (sd, cmd)
 	  if ((simargv[1] == NULL) || (simargv[2] == NULL))
 	    {
 	      fprintf (stderr, "Error: missing argument to watch cmd.\n");
+	      freeargv (simargv);
 	      return;
 	    }
 	  
@@ -2187,6 +2188,8 @@ sim_do_command (sd, cmd)
 	  fprintf (stderr,"Error: \"%s\" is not a valid M.CORE simulator command.\n",
 		   cmd);
 	}
+
+      freeargv (simargv);
     }
   else
     {