diff --git a/libs/openFrameworks/video/ofAVFoundationGrabber.mm b/libs/openFrameworks/video/ofAVFoundationGrabber.mm
index ab1b70b9394..2a0561a2658 100644
--- a/libs/openFrameworks/video/ofAVFoundationGrabber.mm
+++ b/libs/openFrameworks/video/ofAVFoundationGrabber.mm
@@ -496,6 +496,9 @@ - (void)eraseGrabberPtr {
 }
 
 void ofAVFoundationGrabber::setDeviceID(int deviceID) {
+	if( grabber == nil ){
+		grabber = [OSXVideoGrabber alloc];
+	}
 	[grabber setDevice:deviceID];
 	device = deviceID;
 }