diff --git a/content/treestyletab/windowHelperHacks.js b/content/treestyletab/windowHelperHacks.js
index a5fe6a26..65303338 100644
--- a/content/treestyletab/windowHelperHacks.js
+++ b/content/treestyletab/windowHelperHacks.js
@@ -1098,6 +1098,19 @@ TreeStyleTabWindowHelper.overrideExtensionsAfterBrowserInit = function TSTWH_ove
 		);
 	}
 
+	// Duplicate This Tab
+	// https://addons.mozilla.org/firefox/addon/duplicate-this-tab/
+	if ('duplicatethistab' in window &&
+		'openLinkWithHistory' in window.duplicatethistab &&
+		sv.getTreePref('compatibility.DuplicateThisTab')) {
+		eval('duplicatethistab.openLinkWithHistory = '+
+			duplicatethistab.openLinkWithHistory.toSource().replace(
+				'var newTab = ',
+				'TreeStyleTabService.readyToOpenChildTab(); $&'
+			)
+		);
+	}
+
 	window.setTimeout(function(aSelf) {
 		aSelf.overrideExtensionsDelayed();
 	}, 0, this);
diff --git a/defaults/preferences/treestyletab.js b/defaults/preferences/treestyletab.js
index 7616c749..1e7b12e5 100644
--- a/defaults/preferences/treestyletab.js
+++ b/defaults/preferences/treestyletab.js
@@ -569,6 +569,7 @@ pref("extensions.treestyletab.compatibility.ColorfulTabs", true);
 pref("extensions.treestyletab.compatibility.DomainTab", true);
 pref("extensions.treestyletab.compatibility.DragDeGo", true);
 pref("extensions.treestyletab.compatibility.DragNDropToolbars", true);
+pref("extensions.treestyletab.compatibility.DuplicateThisTab", true);
 pref("extensions.treestyletab.compatibility.FirefoxSync", true);
 pref("extensions.treestyletab.compatibility.FireGestures", true);
 pref("extensions.treestyletab.compatibility.FLST", true);