diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4016de8..03e73dd 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -19,7 +19,7 @@ set(Boost_USE_STATIC_LIBS OFF)
 set(Boost_USE_MULTITHREADED ON)
 set(Boost_USE_STATIC_RUNTIME OFF)
 
-set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake_modules/")
+set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${PROJECT_SOURCE_DIR}/cmake_modules/")
 SET(CMAKE_CXX_STANDARD 14)
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS_INIT} -Wall -pedantic -fPIC")
 set(CMAKE_CXX_FLAGS_DEBUG "-g -O0")