diff --git a/Lidgren.Network/NetConstants.cs b/Lidgren.Network/NetConstants.cs
index a2caa56..9e3f538 100644
--- a/Lidgren.Network/NetConstants.cs
+++ b/Lidgren.Network/NetConstants.cs
@@ -40,6 +40,8 @@ namespace Lidgren.Network
 
 		internal const int MaxFragmentationGroups = ushort.MaxValue - 1;
 
+		internal const int UnfragmentedMessageHeaderSize = 5;
+
 		/// <summary>
 		/// Number of channels which needs a sequence number to work
 		/// </summary>
diff --git a/Lidgren.Network/NetOutgoingMessage.cs b/Lidgren.Network/NetOutgoingMessage.cs
index b173a35..f2748ec 100644
--- a/Lidgren.Network/NetOutgoingMessage.cs
+++ b/Lidgren.Network/NetOutgoingMessage.cs
@@ -106,7 +106,7 @@ namespace Lidgren.Network
 
 		internal int GetEncodedSize()
 		{
-			int retval = 5; // regular headers
+			int retval = NetConstants.UnfragmentedMessageHeaderSize; // regular headers
 			if (m_fragmentGroup != 0)
 				retval += NetFragmentationHelper.GetFragmentationHeaderSize(m_fragmentGroup, m_fragmentGroupTotalBits / 8, m_fragmentChunkByteSize, m_fragmentChunkNumber);
 			retval += this.LengthBytes;
diff --git a/Lidgren.Network/NetPeer.Send.cs b/Lidgren.Network/NetPeer.Send.cs
index 13a4e23..7eab62d 100644
--- a/Lidgren.Network/NetPeer.Send.cs
+++ b/Lidgren.Network/NetPeer.Send.cs
@@ -46,7 +46,7 @@ namespace Lidgren.Network
 				throw new NetException("This message has already been sent! Use NetPeer.SendMessage() to send to multiple recipients efficiently");
 			msg.m_isSent = true;
 
-			int len = 5 + msg.LengthBytes; // headers + length, faster than calling msg.GetEncodedSize
+			int len = NetConstants.UnfragmentedMessageHeaderSize + msg.LengthBytes; // headers + length, faster than calling msg.GetEncodedSize
 			if (len <= recipient.m_currentMTU)
 			{
 				Interlocked.Increment(ref msg.m_recyclingCount);