Index: src/OFDNSResolver.m
==================================================================
--- src/OFDNSResolver.m
+++ src/OFDNSResolver.m
@@ -118,11 +118,12 @@
  * TODO:
  *
  *  - Fallback to TCP
  */
 
-static of_run_loop_mode_t resolveRunLoopMode = @"of_dns_resolver_resolve_mode";
+static const of_run_loop_mode_t resolveRunLoopMode =
+    @"of_dns_resolver_resolve_mode";
 
 @interface OFDNSResolverSettings: OFObject
 {
 @public
 	OFArray OF_GENERIC(OFString *) *_nameServers, *_searchDomains;

Index: src/OFTCPSocket.m
==================================================================
--- src/OFTCPSocket.m
+++ src/OFTCPSocket.m
@@ -56,13 +56,15 @@
 #import "OFSetOptionFailedException.h"
 
 #import "socket.h"
 #import "socket_helpers.h"
 
+static const of_run_loop_mode_t connectRunLoopMode =
+    @"of_tcp_socket_connect_mode";
+
 Class of_tls_socket_class = Nil;
 
-static of_run_loop_mode_t connectRunLoopMode = @"of_tcp_socket_connect_mode";
 static OFString *defaultSOCKS5Host = nil;
 static uint16_t defaultSOCKS5Port = 1080;
 
 @interface OFTCPSocket_AsyncConnectDelegate: OFObject <OFTCPSocketDelegate,
     OFTCPSocketDelegate_Private, OFDNSResolverDelegate>