diff --git a/compiler-rt/lib/hwasan/hwasan_allocator.h b/compiler-rt/lib/hwasan/hwasan_allocator.h
--- a/compiler-rt/lib/hwasan/hwasan_allocator.h
+++ b/compiler-rt/lib/hwasan/hwasan_allocator.h
@@ -114,7 +114,7 @@
   // Aliases are mapped next to shadow so that the upper bits match the shadow
   // base.
   return (addr >> kTaggableRegionCheckShift) ==
-         (__hwasan_shadow_memory_dynamic_address >> kTaggableRegionCheckShift);
+         (SHADOW_OFFSET >> kTaggableRegionCheckShift);
 #endif
   return true;
 }
diff --git a/compiler-rt/lib/hwasan/hwasan_mapping.h b/compiler-rt/lib/hwasan/hwasan_mapping.h
--- a/compiler-rt/lib/hwasan/hwasan_mapping.h
+++ b/compiler-rt/lib/hwasan/hwasan_mapping.h
@@ -37,6 +37,12 @@
 constexpr uptr kShadowScale = 4;
 constexpr uptr kShadowAlignment = 1ULL << kShadowScale;
 
+#if SANITIZER_FUCHSIA
+#  define SHADOW_OFFSET (0)
+#else
+#  define SHADOW_OFFSET __hwasan_shadow_memory_dynamic_address
+#endif
+
 namespace __hwasan {
 
 extern uptr kLowMemStart;
@@ -51,11 +57,10 @@
 extern uptr kAliasRegionStart;
 
 inline uptr MemToShadow(uptr untagged_addr) {
-  return (untagged_addr >> kShadowScale) +
-         __hwasan_shadow_memory_dynamic_address;
+  return (untagged_addr >> kShadowScale) + SHADOW_OFFSET
 }
 inline uptr ShadowToMem(uptr shadow_addr) {
-  return (shadow_addr - __hwasan_shadow_memory_dynamic_address) << kShadowScale;
+  return (shadow_addr - SHADOW_OFFSET) << kShadowScale;
 }
 inline uptr MemToShadowSize(uptr size) {
   return size >> kShadowScale;