diff --git a/gtk2_ardour/ardour_ui.h b/gtk2_ardour/ardour_ui.h
index 1654d3ac7c..9d76e9c3ce 100644
--- a/gtk2_ardour/ardour_ui.h
+++ b/gtk2_ardour/ardour_ui.h
@@ -213,7 +213,6 @@ public:
 	void launch_reference ();
 	void launch_tracker ();
 	void launch_subscribe ();
-	void launch_cheat_sheet ();
 	void launch_website ();
 	void launch_website_dev ();
 	void launch_forums ();
diff --git a/gtk2_ardour/ardour_ui_access_web.cc b/gtk2_ardour/ardour_ui_access_web.cc
index ccacd441bc..5cf36db803 100644
--- a/gtk2_ardour/ardour_ui_access_web.cc
+++ b/gtk2_ardour/ardour_ui_access_web.cc
@@ -89,16 +89,6 @@ ARDOUR_UI::launch_subscribe ()
 	PBD::open_uri ("https://community.ardour.org/s/subscribe");
 }
 
-void
-ARDOUR_UI::launch_cheat_sheet ()
-{
-#ifdef __APPLE__
-	PBD::open_uri ("http://manual.ardour.org/files/a3_mnemonic_cheat_sheet_osx.pdf");
-#else
-	PBD::open_uri ("http://manual.ardour.org/files/a3_mnemonic_cheatsheet.pdf");
-#endif
-}
-
 void
 ARDOUR_UI::launch_website ()
 {
diff --git a/gtk2_ardour/ardour_ui_ed.cc b/gtk2_ardour/ardour_ui_ed.cc
index 6f045b1e48..8ed5809e0b 100644
--- a/gtk2_ardour/ardour_ui_ed.cc
+++ b/gtk2_ardour/ardour_ui_ed.cc
@@ -289,7 +289,6 @@ ARDOUR_UI::install_actions ()
 	ActionManager::register_action (common_actions, X_("tutorial"), S_("Help|Tutorial"),  mem_fun(*this, &ARDOUR_UI::launch_tutorial));
 	ActionManager::register_action (common_actions, X_("reference"), S_("Manual|Reference"),  mem_fun(*this, &ARDOUR_UI::launch_reference));
 	ActionManager::register_action (common_actions, X_("tracker"), _("Report a Bug"), mem_fun(*this, &ARDOUR_UI::launch_tracker));
-	ActionManager::register_action (common_actions, X_("cheat-sheet"), _("Cheat Sheet"), mem_fun(*this, &ARDOUR_UI::launch_cheat_sheet));
 	ActionManager::register_action (common_actions, X_("website"), _("Website"), mem_fun(*this, &ARDOUR_UI::launch_website));
 	ActionManager::register_action (common_actions, X_("website-dev"), _("Development"), mem_fun(*this, &ARDOUR_UI::launch_website_dev));
 	ActionManager::register_action (common_actions, X_("forums"), _("User Forums"), mem_fun(*this, &ARDOUR_UI::launch_forums));