diff --git a/build_tools/llvm_version.txt b/build_tools/llvm_version.txt
index 30bebb8..d851425 100644
--- a/build_tools/llvm_version.txt
+++ b/build_tools/llvm_version.txt
@@ -1,2 +1,2 @@
-cfa7094e49cfb7e37a84c0aa57c85c64c0581d17
+51ff04567b2f8d06b2062bd3ed72eab2e93e4466