diff --git a/runtime/mirror/object.cc b/runtime/mirror/object.cc
index 9578c97..4227723 100644
--- a/runtime/mirror/object.cc
+++ b/runtime/mirror/object.cc
@@ -135,11 +135,11 @@
   return copy;
 }
 
-int32_t Object::GenerateIdentityHashCode() {
-  static AtomicInteger seed(987654321 + std::time(nullptr));
-  int32_t expected_value, new_value;
+uint32_t Object::GenerateIdentityHashCode() {
+  static Atomic<uint32_t> seed(987654321U + std::time(nullptr));
+  uint32_t expected_value, new_value;
   do {
-    expected_value = static_cast<uint32_t>(seed.LoadRelaxed());
+    expected_value = seed.LoadRelaxed();
     new_value = expected_value * 1103515245 + 12345;
   } while ((expected_value & LockWord::kHashMask) == 0 ||
       !seed.CompareExchangeWeakRelaxed(expected_value, new_value));
diff --git a/runtime/mirror/object.h b/runtime/mirror/object.h
index b2b2420..0ce5231 100644
--- a/runtime/mirror/object.h
+++ b/runtime/mirror/object.h
@@ -451,7 +451,7 @@
   }
 
   // Generate an identity hash code.
-  static int32_t GenerateIdentityHashCode();
+  static uint32_t GenerateIdentityHashCode();
 
   // A utility function that copies an object in a read barrier and
   // write barrier-aware way. This is internally used by Clone() and