diff --git a/include/rapidjson/document.h b/include/rapidjson/document.h
index 3838af9..095aa40 100644
--- a/include/rapidjson/document.h
+++ b/include/rapidjson/document.h
@@ -1231,7 +1231,7 @@ public:
         for (MemberIterator itr = pos; itr != last; ++itr)
             itr->~Member();
         std::memmove(&*pos, &*last, static_cast<size_t>(MemberEnd() - last) * sizeof(Member));
-        data_.o.size -= (last - first);
+        data_.o.size -= static_cast<SizeType>(last - first);
         return pos;
     }
 
@@ -1431,7 +1431,7 @@ public:
         for (ValueIterator itr = pos; itr != last; ++itr)
             itr->~GenericValue();       
         std::memmove(pos, last, static_cast<size_t>(End() - last) * sizeof(GenericValue));
-        data_.a.size -= (last - first);
+        data_.a.size -= static_cast<SizeType>(last - first);
         return pos;
     }
 
diff --git a/include/rapidjson/rapidjson.h b/include/rapidjson/rapidjson.h
index 41790cf..e3560b7 100644
--- a/include/rapidjson/rapidjson.h
+++ b/include/rapidjson/rapidjson.h
@@ -467,7 +467,7 @@ RAPIDJSON_NAMESPACE_END
 ///////////////////////////////////////////////////////////////////////////////
 // RAPIDJSON_NORETURN_SUFFIX
 
-#if defined(__clang__)
+#if defined(__clang__) && !defined(NDEBUG)
 #define RAPIDJSON_NORETURN_SUFFIX __attribute__ ((noreturn))
 #else
 #define RAPIDJSON_NORETURN_SUFFIX
diff --git a/test/unittest/valuetest.cpp b/test/unittest/valuetest.cpp
index 4e08e54..8d0f762 100644
--- a/test/unittest/valuetest.cpp
+++ b/test/unittest/valuetest.cpp
@@ -492,7 +492,7 @@ TEST(Value, Int64) {
     EXPECT_FALSE(z.IsUint());
     EXPECT_NEAR(4294967296.0, z.GetDouble(), 0.0);
 
-    z.SetInt64(int64_t(-2147483648) - 1);   // -2^31-1, cannot cast as int
+    z.SetInt64(-int64_t(2147483648u) - 1);   // -2^31-1, cannot cast as int
     EXPECT_FALSE(z.IsInt());
     EXPECT_NEAR(-2147483649.0, z.GetDouble(), 0.0);