diff --git a/gtk2_ardour/ardour_ui.cc b/gtk2_ardour/ardour_ui.cc
index 815d8e88bc..f2d0132b48 100644
--- a/gtk2_ardour/ardour_ui.cc
+++ b/gtk2_ardour/ardour_ui.cc
@@ -377,7 +377,7 @@ ARDOUR_UI::ARDOUR_UI (int *argcp, char **argvp[], const char* localedir, UIConfi
 	setup_gtk_ardour_enums ();
 	setup_profile ();
 
-	SessionEvent::create_per_thread_pool ("GUI", 512);
+	SessionEvent::create_per_thread_pool ("GUI", 4096);
 
 	/* we like keyboards */