diff --git a/src/include/lwip/apps/mqtt.h b/src/include/lwip/apps/mqtt.h
index 5e942bb6..ba736cf2 100644
--- a/src/include/lwip/apps/mqtt.h
+++ b/src/include/lwip/apps/mqtt.h
@@ -40,6 +40,7 @@
 #include "lwip/apps/mqtt_opts.h"
 #include "lwip/err.h"
 #include "lwip/ip_addr.h"
+#include "lwip/apps/altcp_tls.h"
 
 #ifdef __cplusplus
 extern "C" {