diff --git a/third_party/llvm-10.0/CMakeLists.txt b/third_party/llvm-10.0/CMakeLists.txt
index 0124ffe..96141e9 100644
--- a/third_party/llvm-10.0/CMakeLists.txt
+++ b/third_party/llvm-10.0/CMakeLists.txt
@@ -753,6 +753,7 @@
     ${LLVM_DIR}/lib/Transforms/Scalar/LoopUnrollPass.cpp
     ${LLVM_DIR}/lib/Transforms/Scalar/LoopUnswitch.cpp
     ${LLVM_DIR}/lib/Transforms/Scalar/LoopVersioningLICM.cpp
+    ${LLVM_DIR}/lib/Transforms/Scalar/LowerAtomic.cpp
     ${LLVM_DIR}/lib/Transforms/Scalar/LowerConstantIntrinsics.cpp
     ${LLVM_DIR}/lib/Transforms/Scalar/LowerExpectIntrinsic.cpp
     ${LLVM_DIR}/lib/Transforms/Scalar/LowerMatrixIntrinsics.cpp