diff --git a/compiler-rt/lib/gwp_asan/platform_specific/guarded_pool_allocator_posix.cpp b/compiler-rt/lib/gwp_asan/platform_specific/guarded_pool_allocator_posix.cpp
--- a/compiler-rt/lib/gwp_asan/platform_specific/guarded_pool_allocator_posix.cpp
+++ b/compiler-rt/lib/gwp_asan/platform_specific/guarded_pool_allocator_posix.cpp
@@ -106,6 +106,7 @@
     if (auto *S = getSingleton())
       S->enable();
   };
-  pthread_atfork(Disable, Enable, Enable);
+  static int Done = pthread_atfork(Disable, Enable, Enable);
+  (void)Done;
 }
 } // namespace gwp_asan