diff --git a/cmake/modules/AddLLVM.cmake b/cmake/modules/AddLLVM.cmake
index daeb46719c6..abc14d0d374 100755
--- a/cmake/modules/AddLLVM.cmake
+++ b/cmake/modules/AddLLVM.cmake
@@ -128,7 +128,9 @@ endmacro(add_llvm_utility name)
 
 
 macro(add_llvm_target target_name)
-  include_directories(BEFORE ${CMAKE_CURRENT_BINARY_DIR})
+  include_directories(BEFORE
+    ${CMAKE_CURRENT_BINARY_DIR}
+    ${CMAKE_CURRENT_SOURCE_DIR})
   add_llvm_library(LLVM${target_name} ${ARGN} ${TABLEGEN_OUTPUT})
   set( CURRENT_LLVM_TARGET LLVM${target_name} )
 endmacro(add_llvm_target)