diff --git a/iocore/net/quic/Mock.h b/iocore/net/quic/Mock.h
index af8b7ff50b6..66f8f56ebad 100644
--- a/iocore/net/quic/Mock.h
+++ b/iocore/net/quic/Mock.h
@@ -113,7 +113,7 @@ class MockQUICConnection : public QUICConnection
   }
 
   Ptr<ProxyMutex>
-  get_transmitter_mutex() override
+  get_packet_transmitter_mutex() override
   {
     return this->_mutex;
   }
@@ -224,7 +224,7 @@ class MockQUICPacketTransmitter : public QUICPacketTransmitter
   }
 
   Ptr<ProxyMutex>
-  get_transmitter_mutex() override
+  get_packet_transmitter_mutex() override
   {
     return this->_mutex;
   }