diff --git a/chrome/locale/en-US/zotero/zotero.properties b/chrome/locale/en-US/zotero/zotero.properties
index 1700707be..e0f2c770b 100644
--- a/chrome/locale/en-US/zotero/zotero.properties
+++ b/chrome/locale/en-US/zotero/zotero.properties
@@ -508,6 +508,8 @@ integration.deleteCitedItem.body	= This reference is cited in the text of your d
 integration.emptyCitationWarning.title	= Blank Citation
 integration.emptyCitationWarning.body	= The citation you have specified would be empty in the currently selected style. Are you sure you want to add it?
 
+integration.error.title					= Zotero Integration Error
+integration.error.notInstalled			= Firefox could not load the component required to communicate with your word processor. Please ensure that the appropriate Firefox extension is installed, then try again.
 integration.error.generic				= Zotero experienced an error updating your document.
 integration.error.mustInsertCitation 	= You must insert a citation before performing this operation.
 integration.error.mustInsertBibliography = You must insert a bibliography before performing this operation.