diff --git a/lib/ftp.c b/lib/ftp.c
index 13ea3b9a0d..1379a93803 100644
--- a/lib/ftp.c
+++ b/lib/ftp.c
@@ -617,7 +617,7 @@ CURLcode _ftp(struct connectdata *conn)
       sscanf( inet_ntoa(in), "%hu.%hu.%hu.%hu",
               &ip[0], &ip[1], &ip[2], &ip[3]);
 #endif
-      sendf(data->firstsocket, data, "PORT %d,%d,%d,%d,%d,%d\n",
+      sendf(data->firstsocket, data, "PORT %d,%d,%d,%d,%d,%d\r\n",
             ip[0], ip[1], ip[2], ip[3],
             porttouse >> 8,
             porttouse & 255);