diff --git a/plugins/mac-syphon/syphon.m b/plugins/mac-syphon/syphon.m
index 6d4a5c230..a34f5eb29 100644
--- a/plugins/mac-syphon/syphon.m
+++ b/plugins/mac-syphon/syphon.m
@@ -892,8 +892,9 @@ static void syphon_release(void *param)
 
 static inline obs_properties_t *syphon_properties_internal(syphon_t s)
 {
-	if (s)
-		obs_source_addref(s->source);
+	if (s && obs_source_get_ref(s->source) == NULL) {
+		s = NULL;
+	}
 
 	obs_properties_t *props =
 		obs_properties_create_param(s, syphon_release);