diff --git a/katabatic/CMakeLists.txt b/katabatic/CMakeLists.txt
index ef3a5ba9..c334da6c 100644
--- a/katabatic/CMakeLists.txt
+++ b/katabatic/CMakeLists.txt
@@ -24,20 +24,16 @@ MACRO(SETUP_PROJECT_PATHS project)
   IF( NOT("$ENV{${project}_TOP}" STREQUAL "") )
     MESSAGE("-- ${project}_TOP is set to $ENV{${project}_TOP}")
     SET(PROJECT_MODULE_PATH "$ENV{${project}_TOP}/share/cmake_modules/")
-    LIST(FIND CMAKE_MODULE_PATH "${PROJECT_MODULE_PATH}" DIR_INDEX)
-    IF( DIR_INDEX LESS 0)
-      LIST(INSERT CMAKE_MODULE_PATH 0 "${PROJECT_MODULE_PATH}")
-    ENDIF( DIR_INDEX LESS 0)
+    LIST(INSERT CMAKE_MODULE_PATH 0 "${PROJECT_MODULE_PATH}")
   ENDIF( NOT("$ENV{${project}_TOP}" STREQUAL "") )
 
   IF( NOT("$ENV{${project}_USER_TOP}" STREQUAL "") )
     MESSAGE("-- ${project}_USER_TOP is set to $ENV{${project}_USER_TOP}")
     SET(PROJECT_MODULE_PATH   "$ENV{${project}_USER_TOP}/share/cmake_modules/")
-    LIST(FIND CMAKE_MODULE_PATH "${PROJECT_MODULE_PATH}" DIR_INDEX)
-    IF( DIR_INDEX LESS 0)
-      LIST(INSERT CMAKE_MODULE_PATH 0 "${PROJECT_MODULE_PATH}")
-    ENDIF( DIR_INDEX LESS 0)
+    LIST(INSERT CMAKE_MODULE_PATH 0 "${PROJECT_MODULE_PATH}")
   ENDIF( NOT("$ENV{${project}_USER_TOP}" STREQUAL "") )
+
+  LIST(REMOVE_DUPLICATES CMAKE_MODULE_PATH)
 ENDMACRO(SETUP_PROJECT_PATHS project)
 
 SETUP_PROJECT_PATHS(IO)