diff --git a/raknet/ReliabilityLayer.cpp b/raknet/ReliabilityLayer.cpp
index 25f152a..8b9820e 100644
--- a/raknet/ReliabilityLayer.cpp
+++ b/raknet/ReliabilityLayer.cpp
@@ -1610,7 +1610,7 @@ int ReliabilityLayer::GetBitStreamHeaderLength( const InternalPacket *const inte
 
 	// Write the PacketReliability.  This is encoded in 3 bits
 	//bitStream->WriteBits((unsigned char*)&(internalPacket->reliability), 3, true);
-	bitLength += 3;
+	bitLength += reliabilitySizeInBits;
 
 	// If the reliability requires an ordering channel and ordering index, we Write those.
 	if ( internalPacket->reliability == UNRELIABLE_SEQUENCED || internalPacket->reliability == RELIABLE_SEQUENCED || internalPacket->reliability == RELIABLE_ORDERED )
diff --git a/raknet/ReliabilityLayer.h b/raknet/ReliabilityLayer.h
index fa53c9c..0c8d69b 100644
--- a/raknet/ReliabilityLayer.h
+++ b/raknet/ReliabilityLayer.h
@@ -314,6 +314,8 @@ private:
 //	unsigned int *receivedPackets;
 	unsigned int blockWindowIncreaseUntilTime;
 	RakNetStatisticsStruct statistics;
+	
+	unsigned reliabilitySizeInBits;
 
 	/// Memory-efficient receivedPackets algorithm:
 	/// receivedPacketsBaseIndex is the packet number we are expecting