diff --git a/llvm/utils/gn/secondary/llvm/include/llvm/Config/BUILD.gn b/llvm/utils/gn/secondary/llvm/include/llvm/Config/BUILD.gn
index 80a91507fcc69..2da26d102e772 100644
--- a/llvm/utils/gn/secondary/llvm/include/llvm/Config/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/include/llvm/Config/BUILD.gn
@@ -325,6 +325,7 @@ write_cmake_config("llvm-config") {
     "LLVM_ENABLE_ZSTD=",
     "LLVM_FORCE_USE_OLD_TOOLCHAIN=",
     "LLVM_HAS_ATOMICS=1",
+    "LLVM_HAS_LOGF128=",
     "LLVM_HAVE_TFLITE=",
     "LLVM_HOST_TRIPLE=$llvm_current_triple",
     "LLVM_NATIVE_ARCH=$native_target",
diff --git a/llvm/utils/gn/secondary/llvm/test/BUILD.gn b/llvm/utils/gn/secondary/llvm/test/BUILD.gn
index 826dcf4e6ee9b..60d6d7b8c3ce7 100644
--- a/llvm/utils/gn/secondary/llvm/test/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/test/BUILD.gn
@@ -64,6 +64,7 @@ write_lit_config("lit_site_cfg") {
     "LLVM_ENABLE_HTTPLIB=0",
     "LLVM_ENABLE_ZSTD=0",
     "LLVM_FORCE_VC_REVISION=",
+    "LLVM_HAS_LOGF128=0",
     "LLVM_HAVE_OPT_VIEWER_MODULES=0",
     "LLVM_HOST_TRIPLE=$llvm_current_triple",
     "LLVM_INCLUDE_DXIL_TESTS=0",