diff --git a/lib/ftp.c b/lib/ftp.c
index f092cbb3a83cb5b6f8c263f9bdbe720ee1ad6919..1cb5d14dad64465e8a7cf14b495bdcaa7ab38371 100644
--- a/lib/ftp.c
+++ b/lib/ftp.c
@@ -1316,8 +1316,11 @@ static CURLcode ftp_state_post_listtype(struct connectdata *conn)
                  lstArg? " ": "",
                  lstArg? lstArg: "" );
 
-  if(!cmd)
+  if(!cmd) {
+    if(lstArg)
+      free(lstArg);
     return CURLE_OUT_OF_MEMORY;
+  }
 
   NBFTPSENDF(conn, "%s",cmd);