diff --git a/session.go b/session.go
index e9087e4ed..f3a87d63d 100644
--- a/session.go
+++ b/session.go
@@ -761,6 +761,9 @@ func (s *session) handleSinglePacket(p *receivedPacket, hdr *wire.Header) bool /
 	// The server can change the source connection ID with the first Handshake packet.
 	// After this, all packets with a different source connection have to be ignored.
 	if s.receivedFirstPacket && hdr.IsLongHeader && !hdr.SrcConnectionID.Equal(s.handshakeDestConnID) {
+		if s.qlogger != nil {
+			s.qlogger.DroppedPacket(qlog.PacketTypeFromHeader(hdr), protocol.ByteCount(len(p.data)), qlog.PacketDropUnknownConnectionID)
+		}
 		s.logger.Debugf("Dropping %s packet (%d bytes) with unexpected source connection ID: %s (expected %s)", hdr.PacketType(), len(p.data), hdr.SrcConnectionID, s.handshakeDestConnID)
 		return false
 	}
diff --git a/session_test.go b/session_test.go
index faa01bda3..1b97a7775 100644
--- a/session_test.go
+++ b/session_test.go
@@ -769,6 +769,7 @@ var _ = Describe("Session", func() {
 			Expect(sess.handlePacketImpl(p1)).To(BeTrue())
 			// The next packet has to be ignored, since the source connection ID doesn't match.
 			p2 := getPacket(hdr2, nil)
+			qlogger.EXPECT().DroppedPacket(qlog.PacketTypeHandshake, protocol.ByteCount(len(p2.data)), qlog.PacketDropUnknownConnectionID)
 			Expect(sess.handlePacketImpl(p2)).To(BeFalse())
 		})
 
@@ -2185,6 +2186,7 @@ var _ = Describe("Client Session", func() {
 			qlogger.EXPECT().ReceivedPacket(gomock.Any(), gomock.Any(), gomock.Any())
 			Expect(sess.handlePacketImpl(getPacket(hdr1, nil))).To(BeTrue())
 			// The next packet has to be ignored, since the source connection ID doesn't match.
+			qlogger.EXPECT().DroppedPacket(gomock.Any(), gomock.Any(), gomock.Any())
 			Expect(sess.handlePacketImpl(getPacket(hdr2, nil))).To(BeFalse())
 		})