diff --git a/chrome/content/zotero/preferences/preferences.xul b/chrome/content/zotero/preferences/preferences.xul
index 97ec19bf46..81b1a832a7 100644
--- a/chrome/content/zotero/preferences/preferences.xul
+++ b/chrome/content/zotero/preferences/preferences.xul
@@ -119,9 +119,8 @@ To add a new preference:
 			</hbox>
 			
 			<checkbox label="&zotero.preferences.reportTranslationFailure;" preference="pref-reportTranslationFailure"/>
-			<!-- TODO: localize -->
-			<checkbox label="Allow zotero.org to customize content based on current Zotero version"
-				tooltiptext="If enabled, the current Zotero version will be added to HTTP requests to zotero.org."
+			<checkbox label="&zotero.preferences.zoteroDotOrgVersionHeader;"
+				tooltiptext="&zotero.preferences.zoteroDotOrgVersionHeader.tooltip;"
 				preference="pref-zoteroDotOrgVersionHeader"/>
 			<checkbox label="&zotero.preferences.parseRISRefer;" preference="pref-parseEndNoteMIMETypes"/>
 			<checkbox label="&zotero.preferences.automaticSnapshots;" preference="pref-automaticSnapshots"/>
diff --git a/chrome/locale/en-US/zotero/preferences.dtd b/chrome/locale/en-US/zotero/preferences.dtd
index 6d48a0daa8..942e7271ba 100644
--- a/chrome/locale/en-US/zotero/preferences.dtd
+++ b/chrome/locale/en-US/zotero/preferences.dtd
@@ -20,6 +20,8 @@
 <!ENTITY zotero.preferences.autoUpdate					"Automatically check for updated translators">
 <!ENTITY zotero.preferences.updateNow					"Update now">
 <!ENTITY zotero.preferences.reportTranslationFailure		"Report broken site translators">
+<!ENTITY zotero.preferences.zoteroDotOrgVersionHeader			"Allow zotero.org to customize content based on current Zotero version">
+<!ENTITY zotero.preferences.zoteroDotOrgVersionHeader.tooltip	"If enabled, the current Zotero version will be added to HTTP requests to zotero.org.">
 <!ENTITY zotero.preferences.parseRISRefer				"Use Zotero for downloaded RIS/Refer files">
 <!ENTITY zotero.preferences.automaticSnapshots			"Automatically take snapshots when creating items from web pages">
 <!ENTITY zotero.preferences.downloadAssociatedFiles		"Automatically attach associated PDFs and other files when saving items">