diff --git a/chrome/content/zotero/xpcom/sync/syncEngine.js b/chrome/content/zotero/xpcom/sync/syncEngine.js
index f23082f81..0fbbcf938 100644
--- a/chrome/content/zotero/xpcom/sync/syncEngine.js
+++ b/chrome/content/zotero/xpcom/sync/syncEngine.js
@@ -906,10 +906,11 @@ Zotero.Sync.Data.Engine.prototype._uploadObjects = Zotero.Promise.coroutine(func
 			// Handle failed objects
 			for (let index in json.results.failed) {
 				let { code, message } = json.results.failed[index];
-				e = new Error(message);
+				let e = new Error(message);
 				e.name = "ZoteroUploadObjectError";
 				e.code = code;
-				Zotero.logError(e);
+				Zotero.logError("Error for " + objectType + " " + batch[index].key + " in "
+					+ this.library.name + ":\n\n" + e);
 				
 				// This shouldn't happen, because the upload request includes a library
 				// version and should prevent an outdated upload before the object version is
diff --git a/chrome/content/zotero/xpcom/sync/syncRunner.js b/chrome/content/zotero/xpcom/sync/syncRunner.js
index 8434f6885..018435b35 100644
--- a/chrome/content/zotero/xpcom/sync/syncRunner.js
+++ b/chrome/content/zotero/xpcom/sync/syncRunner.js
@@ -1088,7 +1088,7 @@ Zotero.Sync.Runner_Module = function (options = {}) {
 			// For unexpected ones, just show a generic message
 			else {
 				// TODO: improve and localize
-				var msg = "An error occurred during syncing:\n\n" + e;
+				var msg = "An error occurred during syncing:\n\n" + e.message;
 			}
 			
 			var desc = doc.createElement('description');