diff --git a/MQTTSNGateway/src/CMakeLists.txt b/MQTTSNGateway/src/CMakeLists.txt
index 236c1eb..1af71b5 100644
--- a/MQTTSNGateway/src/CMakeLists.txt
+++ b/MQTTSNGateway/src/CMakeLists.txt
@@ -84,6 +84,7 @@ TARGET_INCLUDE_DIRECTORIES(mqtt-sngateway_common
        ${OS}
        ${OS}/${SENSORNET}
        ../../MQTTSNPacket/src
+       /usr/local/opt/ssl/include
        )
 
 TARGET_LINK_LIBRARIES(mqtt-sngateway_common