diff --git a/chrome/content/zotero/xpcom/recognizePDF.js b/chrome/content/zotero/xpcom/recognizePDF.js
index dc93cfcf9..00f2a9bad 100644
--- a/chrome/content/zotero/xpcom/recognizePDF.js
+++ b/chrome/content/zotero/xpcom/recognizePDF.js
@@ -89,9 +89,9 @@ Zotero.RecognizePDF = new function () {
 			return;
 		}
 		this.recognizeItems(pdfs);
-		let pane = Zotero.getActiveZoteroPane();
-		if (pane) {
-			Zotero_RecognizePDF_Dialog.open();
+		var win = Services.wm.getMostRecentWindow("navigator:browser");
+		if (win) {
+			win.Zotero_RecognizePDF_Dialog.open();
 		}
 	};