Index: src/OFRunLoop.h
==================================================================
--- src/OFRunLoop.h
+++ src/OFRunLoop.h
@@ -47,11 +47,11 @@
 extern "C" {
 #endif
 /*!
  * @brief The default mode for an OFRunLoop.
  */
-extern of_run_loop_mode_t of_run_loop_mode_default;
+extern const of_run_loop_mode_t of_run_loop_mode_default;
 #ifdef __cplusplus
 }
 #endif
 
 /*!

Index: src/OFRunLoop.m
==================================================================
--- src/OFRunLoop.m
+++ src/OFRunLoop.m
@@ -43,11 +43,11 @@
 #import "OFTimer+Private.h"
 #import "OFDate.h"
 
 #import "OFObserveFailedException.h"
 
-of_run_loop_mode_t of_run_loop_mode_default = @"of_run_loop_mode_default";
+const of_run_loop_mode_t of_run_loop_mode_default = @"of_run_loop_mode_default";
 static OFRunLoop *mainRunLoop = nil;
 
 @interface OFRunLoopState: OFObject
 #ifdef OF_HAVE_SOCKETS
     <OFKernelEventObserverDelegate>