diff --git a/lib/sdp.cpp b/lib/sdp.cpp
index d8136c6e..a194cd9e 100644
--- a/lib/sdp.cpp
+++ b/lib/sdp.cpp
@@ -875,7 +875,7 @@ namespace SDP{
     tConv.clear();
     size_t trackID;
 
-    for (std::map<long unsigned int, Track>::iterator it = tracks.begin(); it != tracks.end(); it++) {
+    for (std::map<uint64_t, Track>::iterator it = tracks.begin(); it != tracks.end(); it++) {
       trackID = myMeta->getID(it->first);
       INFO_MSG("Removing track %zu:%s", it->first, myMeta->getTrackIdentifier(it->first).c_str());
       if (trackID == INVALID_TRACK_ID){
diff --git a/src/input/input_sdp.cpp b/src/input/input_sdp.cpp
index 694ccaa0..62c02aef 100644
--- a/src/input/input_sdp.cpp
+++ b/src/input/input_sdp.cpp
@@ -237,7 +237,7 @@ namespace Mist{
     bool receivedPacket = false;
     // How often to send RTCP receiver requests in seconds
     const uint32_t rtcpInterval = 7;
-    for (std::map<size_t, SDP::Track>::iterator it = sdpState.tracks.begin();
+    for (std::map<uint64_t, SDP::Track>::iterator it = sdpState.tracks.begin();
          it != sdpState.tracks.end(); ++it){
 
       // Get RTP socket for selected track