diff --git a/chrome/content/zotero/xpcom/utilities_internal.js b/chrome/content/zotero/xpcom/utilities_internal.js
index 353d104141..1c68b31d58 100644
--- a/chrome/content/zotero/xpcom/utilities_internal.js
+++ b/chrome/content/zotero/xpcom/utilities_internal.js
@@ -1179,6 +1179,9 @@ Zotero.Utilities.Internal = {
 	 */
 	quitZotero: function(restart=false) {
 		var startup = Services.startup;
+		if (restart) {
+			Zotero.restarting = true;
+		}
 		startup.quit(startup.eAttemptQuit | (restart ? startup.eRestart : 0) );
 	}
 }
diff --git a/chrome/content/zotero/xpcom/zotero.js b/chrome/content/zotero/xpcom/zotero.js
index 8638acee0f..4a8eb226f1 100644
--- a/chrome/content/zotero/xpcom/zotero.js
+++ b/chrome/content/zotero/xpcom/zotero.js
@@ -861,8 +861,10 @@ Components.utils.import("resource://gre/modules/osfile.jsm");
 				// close DB
 				yield Zotero.DB.closeDatabase(true)
 				
-				// broadcast that DB lock has been released
-				Zotero.IPC.broadcast("lockReleased");
+				if (!Zotero.restarting) {
+					// broadcast that DB lock has been released
+					Zotero.IPC.broadcast("lockReleased");
+				}
 			}
 		} catch(e) {
 			Zotero.logError(e);