diff --git a/plugins/mac-avcapture/av-capture.m b/plugins/mac-avcapture/av-capture.m
index e8f03ef22..9ac9ec9c6 100644
--- a/plugins/mac-avcapture/av-capture.m
+++ b/plugins/mac-avcapture/av-capture.m
@@ -89,7 +89,7 @@ struct av_capture {
 	AVCaptureInputPort *port = capture->device_input.ports[0];
 
 	CMTime host_pts = CMSyncConvertTime(info.presentationTimeStamp,
-			port->clock, CMClockGetHostTimeClock());
+			port.clock, CMClockGetHostTimeClock());
 
 	frame->data[0] = addr;
 	frame->timestamp = host_pts.value;