diff --git a/modules/rtp_rtcp/include/rtp_rtcp.h b/modules/rtp_rtcp/include/rtp_rtcp.h
index b877045d81..adce9649d7 100644
--- a/modules/rtp_rtcp/include/rtp_rtcp.h
+++ b/modules/rtp_rtcp/include/rtp_rtcp.h
@@ -123,7 +123,7 @@ class RtpRtcp : public Module, public RtcpFeedbackSenderInterface {
 
     // SSRCs for media and retransmission, respectively.
     // FlexFec SSRC is fetched from |flexfec_sender|.
-    uint32_t local_media_ssrc;
+    uint32_t local_media_ssrc = 0;
     absl::optional<uint32_t> rtx_send_ssrc;
 
    private:
diff --git a/test/fuzzers/rtcp_receiver_fuzzer.cc b/test/fuzzers/rtcp_receiver_fuzzer.cc
index 46bb9eb68b..38213c3a6e 100644
--- a/test/fuzzers/rtcp_receiver_fuzzer.cc
+++ b/test/fuzzers/rtcp_receiver_fuzzer.cc
@@ -43,6 +43,7 @@ void FuzzOneInput(const uint8_t* data, size_t size) {
   RtpRtcp::Configuration config;
   config.clock = &clock;
   config.rtcp_report_interval_ms = kRtcpIntervalMs;
+  config.local_media_ssrc = 1;
 
   RTCPReceiver receiver(config, &rtp_rtcp_module);