diff --git a/logging/rtc_event_log/rtc_event_log_unittest_helper.cc b/logging/rtc_event_log/rtc_event_log_unittest_helper.cc
index d9110fc9f7..f79a0da09a 100644
--- a/logging/rtc_event_log/rtc_event_log_unittest_helper.cc
+++ b/logging/rtc_event_log/rtc_event_log_unittest_helper.cc
@@ -235,6 +235,8 @@ EventGenerator::NewRtcpPacketIncoming() {
     }
     default:
       RTC_NOTREACHED();
+      rtc::Buffer buffer;
+      return rtc::MakeUnique<RtcEventRtcpPacketIncoming>(buffer);
   }
 }
 
@@ -254,6 +256,8 @@ EventGenerator::NewRtcpPacketOutgoing() {
     }
     default:
       RTC_NOTREACHED();
+      rtc::Buffer buffer;
+      return rtc::MakeUnique<RtcEventRtcpPacketOutgoing>(buffer);
   }
 }