diff --git a/chrome/content/zotero/recognizePDF.js b/chrome/content/zotero/recognizePDF.js
index 34de850fbc..40af53eaf6 100644
--- a/chrome/content/zotero/recognizePDF.js
+++ b/chrome/content/zotero/recognizePDF.js
@@ -308,6 +308,7 @@ Zotero_RecognizePDF.Recognizer.prototype.recognize = function(file, callback, ca
 	
 	this._startLine = this._iteration = 0;
 	
+	inputStream.close();
 	cacheFile.remove(false);
 	this._queryGoogle();
 }