diff --git a/src/comm/MAVLinkProtocol.cc b/src/comm/MAVLinkProtocol.cc
index 7e4bb4e8dc0390c424177755722fbfeafbf29f7c..2653e409a294f1f3cf93b2fabf0914b8f572b7d0 100644
--- a/src/comm/MAVLinkProtocol.cc
+++ b/src/comm/MAVLinkProtocol.cc
@@ -191,7 +191,7 @@ void MAVLinkProtocol::_linkStatusChanged(LinkInterface* link, bool connected)
         // Send command to start MAVLink
         // XXX hacky but safe
         // Start NSH
-        const char init[] = {0x0d, 0x0d, 0x0d};
+        const char init[] = {0x0d, 0x0d, 0x0d, 0x0d};
         link->writeBytes(init, sizeof(init));
         const char* cmd = "sh /etc/init.d/rc.usb\n";
         link->writeBytes(cmd, strlen(cmd));