diff --git a/include/mqtt_pal.h b/include/mqtt_pal.h
index 6d4e94b..85c32cd 100644
--- a/include/mqtt_pal.h
+++ b/include/mqtt_pal.h
@@ -69,7 +69,7 @@ extern "C" {
 
 
 /* UNIX-like platform support */
-#if defined(__unix__) || defined(__APPLE__)
+#if defined(__unix__) || defined(__APPLE__) || defined(__NuttX__)
     #include <limits.h>
     #include <string.h>
     #include <stdarg.h>
diff --git a/src/mqtt_pal.c b/src/mqtt_pal.c
index 9b9f69f..24a6b86 100644
--- a/src/mqtt_pal.c
+++ b/src/mqtt_pal.c
@@ -304,7 +304,7 @@ ssize_t mqtt_pal_recvall(mqtt_pal_socket_handle fd, void* buf, size_t bufsz, int
     return (ssize_t)(bufptr - start);
 }
 
-#elif defined(__unix__) || defined(__APPLE__)
+#elif defined(__unix__) || defined(__APPLE__) || defined(__NuttX__)
 
 #include <errno.h>