diff --git a/llvm/utils/gn/secondary/compiler-rt/lib/sanitizer_common/BUILD.gn b/llvm/utils/gn/secondary/compiler-rt/lib/sanitizer_common/BUILD.gn
index af06888a5f35..fdd12817008d 100644
--- a/llvm/utils/gn/secondary/compiler-rt/lib/sanitizer_common/BUILD.gn
+++ b/llvm/utils/gn/secondary/compiler-rt/lib/sanitizer_common/BUILD.gn
@@ -144,6 +144,7 @@ source_set("sources") {
     "sanitizer_termination.cpp",
     "sanitizer_thread_registry.cpp",
     "sanitizer_thread_registry.h",
+    "sanitizer_thread_safety.h",
     "sanitizer_tls_get_addr.cpp",
     "sanitizer_tls_get_addr.h",
     "sanitizer_type_traits.cpp",