diff --git a/talk/app/webrtc/webrtcsdp.cc b/talk/app/webrtc/webrtcsdp.cc
index b2b33fa27..0dcde1d2d 100644
--- a/talk/app/webrtc/webrtcsdp.cc
+++ b/talk/app/webrtc/webrtcsdp.cc
@@ -336,6 +336,8 @@ static bool ParseDtlsSetup(const std::string& line,
                            cricket::ConnectionRole* role,
                            SdpParseError* error);
 
+static bool IsSctp(const std::string& protocol);
+
 // Helper functions
 
 // Below ParseFailed*** functions output the line that caused the parsing
@@ -1185,6 +1187,11 @@ bool ParseExtmap(const std::string& line, RtpHeaderExtension* extmap,
   return true;
 }
 
+static bool IsSctp(const std::string& protocol) {
+  return protocol == cricket::kMediaProtocolDtlsSctp
+    || protocol == cricket::kMediaProtocolUdpDtlsSctp;
+}
+
 void BuildMediaDescription(const ContentInfo* content_info,
                            const TransportInfo* transport_info,
                            const MediaType media_type,