diff --git a/lib/update-v8/constants.js b/lib/update-v8/constants.js
index 408423d3..6169921b 100644
--- a/lib/update-v8/constants.js
+++ b/lib/update-v8/constants.js
@@ -53,7 +53,8 @@ const llvmLibcIgnore = `/third_party/llvm-libc/src/*
 !/third_party/llvm-libc/src/shared
 !/third_party/llvm-libc/src/src
 /third_party/llvm-libc/src/src/*
-!/third_party/llvm-libc/src/src/__support`;
+!/third_party/llvm-libc/src/src/__support
+!/third_party/llvm-libc/src/src/string`;
 
 export const v8Deps = [
   {