diff --git a/modules/rtp_rtcp/source/rtp_utility.cc b/modules/rtp_rtcp/source/rtp_utility.cc
index c814716b44..6e62250cfb 100644
--- a/modules/rtp_rtcp/source/rtp_utility.cc
+++ b/modules/rtp_rtcp/source/rtp_utility.cc
@@ -159,8 +159,9 @@ bool RtpHeaderParser::ParseRtcp(RTPHeader* header) const {
   return true;
 }
 
-bool RtpHeaderParser::Parse(RTPHeader* header,
-                            RtpHeaderExtensionMap* ptrExtensionMap) const {
+bool RtpHeaderParser::Parse(
+    RTPHeader* header,
+    const RtpHeaderExtensionMap* ptrExtensionMap) const {
   const ptrdiff_t length = _ptrRTPDataEnd - _ptrRTPDataBegin;
   if (length < kRtpMinParseLength) {
     return false;
diff --git a/modules/rtp_rtcp/source/rtp_utility.h b/modules/rtp_rtcp/source/rtp_utility.h
index b71b9dca16..14684df4e3 100644
--- a/modules/rtp_rtcp/source/rtp_utility.h
+++ b/modules/rtp_rtcp/source/rtp_utility.h
@@ -51,7 +51,7 @@ class RtpHeaderParser {
   bool RTCP() const;
   bool ParseRtcp(RTPHeader* header) const;
   bool Parse(RTPHeader* parsedPacket,
-             RtpHeaderExtensionMap* ptrExtensionMap = nullptr) const;
+             const RtpHeaderExtensionMap* ptrExtensionMap = nullptr) const;
 
  private:
   void ParseOneByteExtensionHeader(RTPHeader* parsedPacket,