diff --git a/administrator/components/com_templates/forms/source.xml b/administrator/components/com_templates/forms/source.xml
index c6493937c37e7..46bb9587353b6 100644
--- a/administrator/components/com_templates/forms/source.xml
+++ b/administrator/components/com_templates/forms/source.xml
@@ -36,6 +36,7 @@
 			syntax="php"
 			filter="raw"
 			readonly="true"
+                        readonlymode="true"
 		/>
 
 		<field
diff --git a/libraries/src/Form/Field/EditorField.php b/libraries/src/Form/Field/EditorField.php
index 3348be1c0c05a..1066c3ef3bb9e 100644
--- a/libraries/src/Form/Field/EditorField.php
+++ b/libraries/src/Form/Field/EditorField.php
@@ -250,6 +250,7 @@ protected function getInput()
 			'autofocus' => $this->autofocus,
 			'readonly'  => $this->readonly || $this->disabled,
 			'syntax'    => (string) $this->element['syntax'],
+			'readonlymode' => (string) $this->element['readonlymode'],
 		);
 
 		return $editor->display(
diff --git a/plugins/editors/codemirror/codemirror.php b/plugins/editors/codemirror/codemirror.php
index 8267223af49f7..4da3dc72bbe32 100644
--- a/plugins/editors/codemirror/codemirror.php
+++ b/plugins/editors/codemirror/codemirror.php
@@ -129,6 +129,11 @@ public function onDisplay(
 		if (!empty($params['readonly']))
 		{
 			$options->readOnly = 'nocursor';
+
+			if (!empty($params['readonlymode']))
+			{
+				$options->readOnly = $params['readonlymode'];
+			}
 		}
 
 		// Should we focus on the editor on load?