diff --git a/include/rapidjson/document.h b/include/rapidjson/document.h
index 1f490d6a..ef5b3011 100644
--- a/include/rapidjson/document.h
+++ b/include/rapidjson/document.h
@@ -547,7 +547,7 @@ private:
 		kTrueFlag = kTrueType | kBoolFlag,
 		kFalseFlag = kFalseType | kBoolFlag,
 		kNumberIntFlag = kNumberType | kNumberFlag | kIntFlag | kInt64Flag,
-		kNumberUintFlag = kNumberType | kNumberFlag | kUintFlag | kUint64Flag,
+		kNumberUintFlag = kNumberType | kNumberFlag | kUintFlag | kUint64Flag | kInt64Flag,
 		kNumberInt64Flag = kNumberType | kNumberFlag | kInt64Flag,
 		kNumberUint64Flag = kNumberType | kNumberFlag | kUint64Flag,
 		kNumberDoubleFlag = kNumberType | kNumberFlag | kDoubleFlag,
diff --git a/test/unittest/valuetest.cpp b/test/unittest/valuetest.cpp
index 4505573f..1578c035 100644
--- a/test/unittest/valuetest.cpp
+++ b/test/unittest/valuetest.cpp
@@ -189,6 +189,7 @@ TEST(Value, Uint) {
 	z = 2147483648u;	// 2^31, cannot cast as int
 	EXPECT_EQ(2147483648u, z.GetUint());
 	EXPECT_FALSE(z.IsInt());
+	EXPECT_TRUE(z.IsInt64());	// Issue 41: Incorrect parsing of unsigned int number types
 }
 
 TEST(Value, Int64) {