diff --git a/CMakeLists.txt b/CMakeLists.txt
index 00c05908..556e5178 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -205,8 +205,7 @@ if (NOT CMAKE_RUNTIME_OUTPUT_DIRECTORY)
   set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/bin)
 endif ()
 
-set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH}
-  "${CMAKE_CURRENT_SOURCE_DIR}/support/cmake")
+list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/support/cmake")
 
 include(CheckCXXCompilerFlag)
 include(JoinPaths)