diff --git a/CMakeLists.txt b/CMakeLists.txt
index df12053..7ca2d9f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -12,7 +12,7 @@ if(NOT CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
   set(SUBPROJECT TRUE)
 endif()
 
-list(APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake)
+list(PREPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake)
 if(SUBPROJECT)
   set(CMAKE_MODULE_PATH "${CMAKE_MODULE_PATH}" PARENT_SCOPE)
 endif()
diff --git a/cmake/AssertionConfig.cmake b/cmake/AssertionConfig.cmake
index 168f739..4d70cd8 100644
--- a/cmake/AssertionConfig.cmake
+++ b/cmake/AssertionConfig.cmake
@@ -1,3 +1,2 @@
-if(NOT CMAKE_CURRENT_LIST_DIR IN_LIST CMAKE_MODULE_PATH)
-  list(APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_LIST_DIR})
-endif()
+list(REMOVE_ITEM CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}")
+list(PREPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}")