diff --git a/client/CMakeLists.txt b/client/CMakeLists.txt
index 56b5c73e..8daeda6a 100644
--- a/client/CMakeLists.txt
+++ b/client/CMakeLists.txt
@@ -1,5 +1,6 @@
 include_directories(${mosquitto_SOURCE_DIR} ${mosquitto_SOURCE_DIR}/lib
-			${STDBOOL_H_PATH} ${STDINT_H_PATH} ${PTHREAD_INCLUDE_DIR})
+			${STDBOOL_H_PATH} ${STDINT_H_PATH} ${PTHREAD_INCLUDE_DIR}
+			${OPENSSL_INCLUDE_DIR})
 link_directories(${mosquitto_BINARY_DIR}/lib)
 
 set(shared_src client_shared.c client_shared.h)