diff --git a/core/modules/widgets/checkbox.js b/core/modules/widgets/checkbox.js
index 9fa1c4889..1edf0bee0 100644
--- a/core/modules/widgets/checkbox.js
+++ b/core/modules/widgets/checkbox.js
@@ -156,6 +156,9 @@ CheckboxWidget.prototype.handleChangeEvent = function(event) {
 	if(this.checkboxActions) {
 		this.invokeActionString(this.checkboxActions,this,event);
 	}
+	if(this.checkboxCheckActions && checked) {
+		this.invokeActionString(this.checkboxCheckActions,this,event);
+	}
 	if(this.checkboxUncheckActions && !checked) {
 		this.invokeActionString(this.checkboxUncheckActions,this,event);
 	}
@@ -167,6 +170,7 @@ Compute the internal state of the widget
 CheckboxWidget.prototype.execute = function() {
 	// Get the parameters from the attributes
 	this.checkboxActions = this.getAttribute("actions");
+	this.checkboxCheckActions = this.getAttribute("checkactions");
 	this.checkboxUncheckActions = this.getAttribute("uncheckactions");
 	this.checkboxTitle = this.getAttribute("tiddler",this.getVariable("currentTiddler"));
 	this.checkboxTag = this.getAttribute("tag");
diff --git a/editions/tw5.com/tiddlers/widgets/CheckboxWidget.tid b/editions/tw5.com/tiddlers/widgets/CheckboxWidget.tid
index 60f1b389b..87ef7b936 100644
--- a/editions/tw5.com/tiddlers/widgets/CheckboxWidget.tid
+++ b/editions/tw5.com/tiddlers/widgets/CheckboxWidget.tid
@@ -1,6 +1,6 @@
 caption: checkbox
 created: 20131024141900000
-modified: 20161221202816730
+modified: 20190714134002652
 tags: Widgets
 title: CheckboxWidget
 type: text/vnd.tiddlywiki
@@ -26,8 +26,9 @@ The content of the `<$checkbox>` widget is displayed within an HTML `<label>` el
 |unchecked |The value of the field corresponding to the checkbox being unchecked |
 |default |The default value to use if the field is not defined |
 |class |The class that will be assigned to the label element |
-|actions |<<.from-version "5.1.14">> A string containing ActionWidgets to be triggered when the checkbox is checked |
+|actions |<<.from-version "5.1.14">> A string containing ActionWidgets to be triggered when the status of the checkbox changes (whether it is checked or unchecked) |
 |uncheckactions |<<.from-version "5.1.16">> A string containing ActionWidgets to be triggered when the checkbox is unchecked |
+|checkactions |<<.from-version "5.1.20">> A string containing ActionWidgets to be triggered when the checkbox is checked |
 
 !! Tag Mode