diff --git a/llvm/unittests/Support/MemoryTest.cpp b/llvm/unittests/Support/MemoryTest.cpp
index af33dc32c81b..6e5f7472e454 100644
--- a/llvm/unittests/Support/MemoryTest.cpp
+++ b/llvm/unittests/Support/MemoryTest.cpp
@@ -41,6 +41,8 @@ bool IsMPROTECT() {
     err(EXIT_FAILURE, "sysctl");
 
   return !!(paxflags & CTL_PROC_PAXFLAGS_MPROTECT);
+#elif defined(__APPLE__) && defined(__aarch64__)
+  return true;
 #else
   return false;
 #endif