diff --git a/include/momo/Array.h b/include/momo/Array.h
index 3da60da8..b442b3df 100644
--- a/include/momo/Array.h
+++ b/include/momo/Array.h
@@ -857,8 +857,10 @@ class Array
 	void InsertCrt(size_t index, ItemCreator&& itemCreator)
 	{
 		ItemHandler itemHandler(GetMemManager(), std::forward<ItemCreator>(itemCreator));
-		std::move_iterator<Item*> begin(&itemHandler);
-		pvInsert(index, begin, begin + 1);
+		size_t newCount = GetCount() + 1;
+		if (newCount > GetCapacity())
+			pvGrow(newCount, ArrayGrowCause::add);
+		ArrayShifter::InsertNogrow(*this, index, std::move(*&itemHandler));
 	}
 
 	template<typename... ItemArgs>
@@ -874,15 +876,9 @@ class Array
 		size_t grow = (initCount + 1 > GetCapacity());
 		size_t itemIndex = pvIndexOf(item);
 		if (grow || (index <= itemIndex && itemIndex < initCount))
-		{
-			InsertCrt(index, typename ItemTraits::template Creator<Item&&>(
-				GetMemManager(), std::move(item)));
-		}
+			InsertVar(index, std::move(item));
 		else
-		{
-			std::move_iterator<Item*> begin(std::addressof(item));
-			ArrayShifter::InsertNogrow(*this, index, begin, begin + 1);
-		}
+			ArrayShifter::InsertNogrow(*this, index, std::move(item));
 	}
 
 	void Insert(size_t index, const Item& item)
@@ -1092,7 +1088,7 @@ class Array
 		size_t newCount = GetCount() + count;
 		if (newCount > GetCapacity())
 			pvGrow(newCount, ArrayGrowCause::add);
-		ArrayShifter::InsertNogrow(*this, index, begin, end);
+		ArrayShifter::InsertNogrow(*this, index, begin, count);
 	}
 
 	template<typename ArgIterator>
diff --git a/include/momo/ArrayUtility.h b/include/momo/ArrayUtility.h
index afdb36ca..d380126b 100644
--- a/include/momo/ArrayUtility.h
+++ b/include/momo/ArrayUtility.h
@@ -223,11 +223,10 @@ namespace internal
 
 		template<typename ArgIterator>
 		static EnableIf<IsForwardIterator<ArgIterator>::value>
-		InsertNogrow(Array& array, size_t index, ArgIterator begin, ArgIterator end)
+		InsertNogrow(Array& array, size_t index, ArgIterator begin, size_t count)
 		{
 			size_t initCount = array.GetCount();
 			MOMO_CHECK(index <= initCount);
-			size_t count = UIntMath<>::Dist(begin, end);
 			MOMO_ASSERT(array.GetCapacity() >= initCount + count);
 			MemManager& memManager = array.GetMemManager();
 			if (index + count < initCount)
@@ -258,8 +257,7 @@ namespace internal
 		}
 
 		template<typename ArgIterator>
-		static EnableIf<!IsForwardIterator<ArgIterator>::value>
-		Insert(Array& array, size_t index, ArgIterator begin, ArgIterator end)
+		static void Insert(Array& array, size_t index, ArgIterator begin, ArgIterator end)
 		{
 			typedef typename ItemTraits::template Creator<
 				typename std::iterator_traits<ArgIterator>::reference> IterCreator;
@@ -269,6 +267,11 @@ namespace internal
 				array.InsertCrt(index + count, IterCreator(memManager, *iter));
 		}
 
+		static void InsertNogrow(Array& array, size_t index, Item&& item)
+		{
+			InsertNogrow(array, index, std::make_move_iterator(std::addressof(item)), 1);
+		}
+
 		static void Remove(Array& array, size_t index, size_t count)
 		{
 			size_t initCount = array.GetCount();
diff --git a/include/momo/SegmentedArray.h b/include/momo/SegmentedArray.h
index 6d8f8d51..5d7ebdcf 100644
--- a/include/momo/SegmentedArray.h
+++ b/include/momo/SegmentedArray.h
@@ -532,8 +532,8 @@ class SegmentedArray
 	void InsertCrt(size_t index, ItemCreator&& itemCreator)
 	{
 		ItemHandler itemHandler(GetMemManager(), std::forward<ItemCreator>(itemCreator));
-		std::move_iterator<Item*> begin(&itemHandler);
-		pvInsert(index, begin, begin + 1);
+		Reserve(mCount + 1);
+		ArrayShifter::InsertNogrow(*this, index, std::move(*&itemHandler));
 	}
 
 	template<typename... ItemArgs>
@@ -724,8 +724,9 @@ class SegmentedArray
 	internal::EnableIf<internal::IsForwardIterator<ArgIterator>::value>
 	pvInsert(size_t index, ArgIterator begin, ArgIterator end)
 	{
-		Reserve(mCount + internal::UIntMath<>::Dist(begin, end));
-		ArrayShifter::InsertNogrow(*this, index, begin, end);
+		size_t count = internal::UIntMath<>::Dist(begin, end);
+		Reserve(mCount + count);
+		ArrayShifter::InsertNogrow(*this, index, begin, count);
 	}
 
 	template<typename ArgIterator>