diff --git a/libs/surfaces/osc/osc.cc b/libs/surfaces/osc/osc.cc
index 0926739ad3..666c1023c3 100644
--- a/libs/surfaces/osc/osc.cc
+++ b/libs/surfaces/osc/osc.cc
@@ -684,14 +684,14 @@ OSC::register_callbacks()
 bool
 OSC::osc_input_handler (IOCondition ioc, lo_server srv)
 {
-	if (ioc & ~IO_IN) {
-		return false;
-	}
-
 	if (ioc & IO_IN) {
 		lo_server_recv (srv);
 	}
 
+	if (ioc & ~(IO_IN|IO_PRI)) {
+		return false;
+	}
+
 	return true;
 }