diff --git a/Development/nmos/sdp_utils.cpp b/Development/nmos/sdp_utils.cpp
index 2555d823d..da426accd 100644
--- a/Development/nmos/sdp_utils.cpp
+++ b/Development/nmos/sdp_utils.cpp
@@ -832,7 +832,7 @@ namespace nmos
         {
             return sdp_parameters::fmtp_t::value_type{ sdp::fields::DID_SDID, make_fmtp_did_sdid(did_sdid) };
         }));
-        if (0 != params.vpid_code) fmtp.push_back({ sdp::fields::VPID_Code, utility::ostringstreamed(params.vpid_code) });
+        if (0 != params.vpid_code) fmtp.push_back({ sdp::fields::VPID_Code, utility::ostringstreamed((uint32_t)params.vpid_code) });
         if (0 != params.exactframerate) fmtp.push_back({ sdp::fields::exactframerate, nmos::details::make_exactframerate(params.exactframerate) });
         if (!params.tm.empty()) fmtp.push_back({ sdp::fields::TM, params.tm.name });
         if (!params.ssn.empty()) fmtp.push_back({ sdp::fields::smpte_standard_number, params.ssn.name });