diff --git a/chrome/content/zotero/xpcom/fulltext.js b/chrome/content/zotero/xpcom/fulltext.js
index 70ad0d6e5e..f9923a039c 100644
--- a/chrome/content/zotero/xpcom/fulltext.js
+++ b/chrome/content/zotero/xpcom/fulltext.js
@@ -429,7 +429,12 @@ Zotero.Fulltext = new function(){
 			
 			var args = [file.path, infoFile.path];
 			try {
-				proc.run(true, args, args.length);
+				if (!Zotero.isFx36) {
+					proc.runw(true, args, args.length);
+				}
+				else {
+					proc.run(true, args, args.length);
+				}
 				var totalPages = this.getTotalPagesFromFile(itemID);
 			}
 			catch (e) {
@@ -460,7 +465,12 @@ Zotero.Fulltext = new function(){
 		}
 		args.push(file.path, cacheFile.path);
 		try {
-			proc.run(true, args, args.length);
+			if (!Zotero.isFx36) {
+				proc.runw(true, args, args.length);
+			}
+			else {
+				proc.run(true, args, args.length);
+			}
 		}
 		catch (e) {
 			Zotero.debug("Error running pdftotext");