diff --git a/compiler-rt/lib/asan/asan_fake_stack.cc b/compiler-rt/lib/asan/asan_fake_stack.cc
index 8edfd41a8a93..bcaf0f454ce7 100644
--- a/compiler-rt/lib/asan/asan_fake_stack.cc
+++ b/compiler-rt/lib/asan/asan_fake_stack.cc
@@ -129,7 +129,7 @@ static FakeStack *GetFakeStack() {
 }
 
 static FakeStack *GetFakeStackFast() {
-#if SANITIZER_LINUX
+#if 0 && SANITIZER_LINUX  // breaks with signals...
   static THREADLOCAL FakeStack *fake_stack;
   if (!fake_stack)
     fake_stack = GetFakeStack();