diff --git a/OpenVPN Tunnel Provider/OpenVPNError.h b/OpenVPN Tunnel Provider/OpenVPNError.h
index f64df21..01443d5 100644
--- a/OpenVPN Tunnel Provider/OpenVPNError.h	
+++ b/OpenVPN Tunnel Provider/OpenVPNError.h	
@@ -9,4 +9,11 @@
 #import <Foundation/Foundation.h>
 
 extern NSString * __nonnull const OpenVPNClientErrorDomain;
+
 extern NSString *__nonnull const OpenVPNClientErrorFatalKey;
+extern NSString *__nonnull const OpenVPNClientErrorEventKey;
+
+typedef NS_ENUM(NSUInteger, OpenVPNError) {
+    OpenVPNErrorConfigurationFailure,
+    OpenVPNErrorClientFailure
+};