diff --git a/libmemunreachable/tests/MemUnreachable_test.cpp b/libmemunreachable/tests/MemUnreachable_test.cpp
index e464872..9cb1623 100644
--- a/libmemunreachable/tests/MemUnreachable_test.cpp
+++ b/libmemunreachable/tests/MemUnreachable_test.cpp
@@ -47,7 +47,8 @@
 
 // Trick the compiler into thinking a value on the stack is still referenced.
 static void Ref(void** ptr) {
-  write(0, ptr, 0);
+  void** volatile storage;
+  storage = ptr;
 }
 
 class MemunreachableTest : public ::testing::Test {