diff --git a/polly/CMakeLists.txt b/polly/CMakeLists.txt
index 7958274dd6c4..628c761eafd6 100644
--- a/polly/CMakeLists.txt
+++ b/polly/CMakeLists.txt
@@ -141,6 +141,7 @@ endif(SCOPLIB_FOUND)
 
 
 include_directories(
+  BEFORE
   ${CMAKE_CURRENT_SOURCE_DIR}/include
   ${CMAKE_CURRENT_SOURCE_DIR}/lib/JSON/include
   ${CMAKE_CURRENT_BINARY_DIR}/include