diff --git a/core/modules/widgets/linkcatcher.js b/core/modules/widgets/linkcatcher.js
index ea0629d6e..28b906b80 100644
--- a/core/modules/widgets/linkcatcher.js
+++ b/core/modules/widgets/linkcatcher.js
@@ -87,7 +87,8 @@ LinkCatcherWidget.prototype.handleNavigateEvent = function(event) {
 		}
 		if(this.catchActions) {
 			this.executingActions = true;
-			this.invokeActionString(this.catchActions,this,event,{navigateTo: event.navigateTo});
+			var modifierKey = $tw.keyboardManager.getEventModifierKeyDescriptor(event);
+			this.invokeActionString(this.catchActions,this,event,{navigateTo: event.navigateTo, modifier: modifierKey});
 			this.executingActions = false;
 		}
 	} else {
diff --git a/editions/tw5.com/tiddlers/widgets/LinkCatcherWidget.tid b/editions/tw5.com/tiddlers/widgets/LinkCatcherWidget.tid
index 03089da4a..8b9e8642d 100644
--- a/editions/tw5.com/tiddlers/widgets/LinkCatcherWidget.tid
+++ b/editions/tw5.com/tiddlers/widgets/LinkCatcherWidget.tid
@@ -23,5 +23,5 @@ The content of the `<$linkcatcher>` widget is displayed normally.
 |message |Optional identifier for a [[widget message|Messages]] to be sent when a navigation is caught  |
 |set |Optional title of the tiddler to be set to a specified value when navigation occurs |
 |setTo |Value to be assigned by the `set` attribute |
-|actions |Actions to be performed when a link is caught. Within the action string, the variable "navigateTo" contains the title of the tiddler being navigated |
+|actions |Actions to be performed when a link is caught. Within the action string, the variable "navigateTo" contains the title of the tiddler being navigated. <<.from-version "5.1.23">> the <<.def "modifier">> variable lists the modifier keys that are pressed when the action is invoked. The possible modifiers are ''ctrl'', ''ctrl-alt'', ''ctrl-shift'', ''alt'', ''alt-shift'', ''shift'' and ''ctrl-alt-shift'' |