diff --git a/inc/MulticastServerMediaSubsession.h b/inc/MulticastServerMediaSubsession.h
index 9937d46..9e1dfce 100644
--- a/inc/MulticastServerMediaSubsession.h
+++ b/inc/MulticastServerMediaSubsession.h
@@ -9,6 +9,7 @@
 
 #pragma once
 
+#include <map>
 #include "BaseServerMediaSubsession.h"
 
 // -----------------------------------------
@@ -34,7 +35,11 @@ class MulticastServerMediaSubsession : public BaseServerMediaSubsession, public
 											  , m_rtcpInstance)
 				{}			
 
-		virtual char const* sdpLines() ;
+#if LIVEMEDIA_LIBRARY_VERSION_INT < 1610928000
+		virtual char const* sdpLines();
+#else		 
+		virtual char const* sdpLines(int addressFamily);
+#endif		
 		virtual char const* getAuxSDPLine(RTPSink* rtpSink,FramedSource* inputSource);
 		RTPSink* createRtpSink(UsageEnvironment& env
 								, struct in_addr destinationAddress
@@ -43,9 +48,9 @@ class MulticastServerMediaSubsession : public BaseServerMediaSubsession, public
 								, StreamReplicator* replicator);
 		
 	protected:
-		RTPSink*      m_rtpSink;
-		RTCPInstance* m_rtcpInstance;
-		std::string   m_SDPLines;
+		RTPSink*                    m_rtpSink;
+		RTCPInstance*               m_rtcpInstance;
+		std::map<int,std::string>   m_SDPLines;
 };
 
 
diff --git a/src/MulticastServerMediaSubsession.cpp b/src/MulticastServerMediaSubsession.cpp
index 43ce50b..75efa6f 100755
--- a/src/MulticastServerMediaSubsession.cpp
+++ b/src/MulticastServerMediaSubsession.cpp
@@ -58,19 +58,23 @@ RTPSink* MulticastServerMediaSubsession::createRtpSink(UsageEnvironment& env
 	return m_rtpSink;
 }
 
-char const* MulticastServerMediaSubsession::sdpLines() 
-{
-	if (m_SDPLines.empty())
+#if LIVEMEDIA_LIBRARY_VERSION_INT < 1610928000
+char const* MulticastServerMediaSubsession::sdpLines() {
+	int addressFamily = 0;
+#else		 
+char const* MulticastServerMediaSubsession::sdpLines(int addressFamily) { 
+#endif		
+	if (m_SDPLines[addressFamily].empty())
 	{
 		// Ugly workaround to give SPS/PPS that are get from the RTPSink
 #if LIVEMEDIA_LIBRARY_VERSION_INT < 1610928000
-		m_SDPLines.assign(PassiveServerMediaSubsession::sdpLines());
+		m_SDPLines[addressFamily].assign(PassiveServerMediaSubsession::sdpLines());
 #else		 
-		m_SDPLines.assign(PassiveServerMediaSubsession::sdpLines(AF_INET));
+		m_SDPLines[addressFamily].assign(PassiveServerMediaSubsession::sdpLines(addressFamily));
 #endif		
-		m_SDPLines.append(getAuxSDPLine(m_rtpSink,NULL));
+		m_SDPLines[addressFamily].append(getAuxSDPLine(m_rtpSink,NULL));
 	}
-	return m_SDPLines.c_str();
+	return m_SDPLines[addressFamily].c_str();
 }
 
 char const* MulticastServerMediaSubsession::getAuxSDPLine(RTPSink* rtpSink,FramedSource* inputSource)