diff --git a/chrome/content/zotero/preferences/preferences_general.xhtml b/chrome/content/zotero/preferences/preferences_general.xhtml
index aa6a58a6ce..f93a6862f7 100644
--- a/chrome/content/zotero/preferences/preferences_general.xhtml
+++ b/chrome/content/zotero/preferences/preferences_general.xhtml
@@ -221,6 +221,7 @@
 				<html:input type="text" id="openURLServerField" style="flex: 1;"
 					oninput="Zotero_Preferences.General.onOpenURLCustomized();"
 					preference="extensions.zotero.openURL.resolver"
+					dir="ltr"
 				/>
 			</hbox>