diff --git a/chrome/content/zotero/xpcom/translation/browser_firefox.js b/chrome/content/zotero/xpcom/translation/browser_firefox.js
index c9cca5e418..0a74902bd1 100644
--- a/chrome/content/zotero/xpcom/translation/browser_firefox.js
+++ b/chrome/content/zotero/xpcom/translation/browser_firefox.js
@@ -139,6 +139,8 @@ Zotero.Translate.IO.maintainedInstances = [];
 /******* (Native) Read support *******/
 
 Zotero.Translate.IO.Read = function(file, mode) {
+	Zotero.Translate.IO.maintainedInstances.push(this);
+	
 	this.file = file;
 	
 	// open file