diff --git a/graphics/nxmu/nx_connect.c b/graphics/nxmu/nx_connect.c
index 401d20d925..0309e3d6c8 100644
--- a/graphics/nxmu/nx_connect.c
+++ b/graphics/nxmu/nx_connect.c
@@ -152,7 +152,7 @@ NXHANDLE nx_connectionstance(FAR const char *svrmqname)
 #else
   conn->crdmq = mq_open(climqname, O_RDONLY|O_CREAT|O_NONBLOCK, 0666, &attr);
 #endif
-  if (conn->crdmq)
+  if (conn->crdmq == (mqd_t)-1)
     {
       gdbg("mq_open(%s) failed: %d\n", climqname, errno);
       goto errout_with_conn;
@@ -165,7 +165,7 @@ NXHANDLE nx_connectionstance(FAR const char *svrmqname)
   attr.mq_flags   = 0;
 
   conn->cwrmq = mq_open(svrmqname, O_WRONLY|O_CREAT, 0666, &attr);
-  if (conn->cwrmq)
+  if (conn->cwrmq == (mqd_t)-1)
     {
       gdbg("mq_open(%s) failed: %d\n", svrmqname, errno);
       goto errout_with_rmq;
diff --git a/graphics/nxmu/nxmu_server.c b/graphics/nxmu/nxmu_server.c
index 270285be29..352e561925 100644
--- a/graphics/nxmu/nxmu_server.c
+++ b/graphics/nxmu/nxmu_server.c
@@ -116,7 +116,7 @@ static inline void nxmu_connect(FAR struct nxfe_conn_s *conn)
 
   outmsg.msgid = NX_CLIMSG_CONNECTED;
   conn->swrmq  = mq_open(mqname, O_WRONLY);
-  if (conn->swrmq)
+  if (conn->swrmq == (mqd_t)-1)
     {
       gdbg("mq_open(%s) failed: %d\n", mqname, errno);
       outmsg.msgid = NX_CLIMSG_DISCONNECTED;
@@ -224,7 +224,7 @@ static inline int nxmu_setup(FAR const char *mqname,
   attr.mq_flags   = 0;
 
   fe->conn.crdmq = mq_open(mqname, O_RDONLY|O_CREAT, 0666, &attr);
-  if (fe->conn.crdmq)
+  if (fe->conn.crdmq == (mqd_t)-1)
     {
       gdbg("mq_open(%s) failed: %d\n", mqname, errno);
       return ERROR; /* mq_open sets errno */
@@ -239,10 +239,8 @@ static inline int nxmu_setup(FAR const char *mqname,
    * the server message loop.
    */
 
-  /* Open the server MQ for writing (same attributes) */
-
-  fe->conn.cwrmq = mq_open(mqname, O_WRONLY);
-  if (fe->conn.cwrmq)
+  fe->conn.swrmq = mq_open(mqname, O_WRONLY);
+  if (fe->conn.swrmq == (mqd_t)-1)
     {
       gdbg("mq_open(%s) failed: %d\n", mqname, errno);
       mq_close(fe->conn.crdmq);