diff --git a/Makefile b/Makefile
index bbc521f..4e70814 100644
--- a/Makefile
+++ b/Makefile
@@ -52,7 +52,7 @@ ifneq ($(ENABLE_DOCS),1)
 endif
 
 # Set common Clang build flags.
-CPP.Flags += -I$(PROJ_SRC_DIR)/$(CLANG_LEVEL)/include -I$(PROJ_OBJ_DIR)/$(CLANG_LEVEL)/include
+CPP.Flags += -I$(PROJ_OBJ_DIR)/$(CLANG_LEVEL)/include -I$(PROJ_SRC_DIR)/$(CLANG_LEVEL)/include
 ifdef CLANG_VENDOR
 CPP.Flags += -DCLANG_VENDOR='"$(CLANG_VENDOR) "'
 endif