diff --git a/plugins/mac-virtualcam/src/dal-plugin/OBSDALMachClient.mm b/plugins/mac-virtualcam/src/dal-plugin/OBSDALMachClient.mm
index c6126398c..c6c0cde2a 100644
--- a/plugins/mac-virtualcam/src/dal-plugin/OBSDALMachClient.mm
+++ b/plugins/mac-virtualcam/src/dal-plugin/OBSDALMachClient.mm
@@ -114,6 +114,7 @@
 
 			IOSurfaceRef surface = IOSurfaceLookupFromMachPort(
 				[framePort machPort]);
+			[framePort invalidate];
 			mach_port_deallocate(mach_task_self(),
 					     [framePort machPort]);