diff --git a/compiler-rt/lib/scudo/standalone/memtag.h b/compiler-rt/lib/scudo/standalone/memtag.h
--- a/compiler-rt/lib/scudo/standalone/memtag.h
+++ b/compiler-rt/lib/scudo/standalone/memtag.h
@@ -18,16 +18,14 @@
 
 namespace scudo {
 
-#if (__clang_major__ >= 12 && defined(__aarch64__)) || defined(SCUDO_FUZZ)
+#if (__clang_major__ >= 12 && defined(__aarch64__) && SCUDO_LINUX &&           \
+     !defined(SCUDO_DISABLE_TBI)) ||                                           \
+    defined(SCUDO_FUZZ)
 
 // We assume that Top-Byte Ignore is enabled if the architecture supports memory
 // tagging. Not all operating systems enable TBI, so we only claim architectural
 // support for memory tagging if the operating system enables TBI.
-#if SCUDO_LINUX && !defined(SCUDO_DISABLE_TBI)
 inline constexpr bool archSupportsMemoryTagging() { return true; }
-#else
-inline constexpr bool archSupportsMemoryTagging() { return false; }
-#endif
 
 inline constexpr uptr archMemoryTagGranuleSize() { return 16; }