diff --git a/build_tools/llvm_version.txt b/build_tools/llvm_version.txt
index 3a49641..8da5cea 100644
--- a/build_tools/llvm_version.txt
+++ b/build_tools/llvm_version.txt
@@ -1,2 +1,2 @@
-646f19bb9dc86ea5baf38969697a15d0f162ddb0
+1d3d9b9cd808ef37f3dacd3ada81bff1353cd24b