diff --git a/include/nuttx/mqueue.h b/include/nuttx/mqueue.h
index 1e7121284c..cf4d8d2cc5 100644
--- a/include/nuttx/mqueue.h
+++ b/include/nuttx/mqueue.h
@@ -37,7 +37,7 @@
 #include <mqueue.h>
 #include <poll.h>
 
-#if CONFIG_MQ_MAXMSGSIZE > 0
+#if defined(CONFIG_MQ_MAXMSGSIZE) && (CONFIG_MQ_MAXMSGSIZE > 0)
 
 /****************************************************************************
  * Pre-processor Definitions