diff --git a/gtk2_ardour/ardour_ui.cc b/gtk2_ardour/ardour_ui.cc
index 8b23146f84..b0a35418f2 100644
--- a/gtk2_ardour/ardour_ui.cc
+++ b/gtk2_ardour/ardour_ui.cc
@@ -327,7 +327,7 @@ ARDOUR_UI::ARDOUR_UI (int *argcp, char **argvp[], const char* localedir)
 	setup_gtk_ardour_enums ();
 	setup_profile ();
 
-	SessionEvent::create_per_thread_pool ("GUI", 512);
+	SessionEvent::create_per_thread_pool ("GUI", 4096);
 
 	/* we like keyboards */