diff --git a/clang/lib/Tooling/CMakeLists.txt b/clang/lib/Tooling/CMakeLists.txt
index aff39e4de13c0..91e6cbdcbc44f 100644
--- a/clang/lib/Tooling/CMakeLists.txt
+++ b/clang/lib/Tooling/CMakeLists.txt
@@ -135,4 +135,5 @@ add_clang_library(clangTooling
   clangRewrite
   clangSerialization
   clangToolingCore
+  ${LLVM_PTHREAD_LIB}
   )