diff --git a/libs/ardour/route.cc b/libs/ardour/route.cc
index f78cd1e2f1..0ecbe29995 100644
--- a/libs/ardour/route.cc
+++ b/libs/ardour/route.cc
@@ -3730,7 +3730,7 @@ Route::set_active (bool yn, void* src)
 void
 Route::meter ()
 {
-	Glib::Threads::RWLock::ReaderLock rm (_processor_lock, Glib::Threads::TRY_LOCK);
+	Glib::Threads::RWLock::ReaderLock rm (_processor_lock);
 
 	assert (_meter);