diff --git a/build_tools/llvm_version.txt b/build_tools/llvm_version.txt
index 8738b14..fcaf0d4 100644
--- a/build_tools/llvm_version.txt
+++ b/build_tools/llvm_version.txt
@@ -1,2 +1,2 @@
-079757b551f3ab5218af7344a7ab3c79976ec478
+f21212215031e5871c389999daf3b06b1a6250fd