diff --git a/CMakeLists.txt b/CMakeLists.txt
index a7910ae9..f430eeeb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,7 +10,7 @@ cmake_policy(SET CMP0042 NEW)
 project(mosquitto)
 set (VERSION 2.0.2)
 
-set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake/")
+list(APPEND CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake/")
 
 add_definitions (-DCMAKE -DVERSION=\"${VERSION}\")