diff --git a/src/incl_priv/mhd_sys_options.h b/src/incl_priv/mhd_sys_options.h
index 64fccd41..6d99ebbc 100644
--- a/src/incl_priv/mhd_sys_options.h
+++ b/src/incl_priv/mhd_sys_options.h
@@ -283,9 +283,6 @@
 #  define MHD_FIXED_FLAGS_ENUM_MHD_APP_SET_ MHD_FLAGS_ENUM_ /* enum can be extended in next MHD versions */
 #endif
 
-#ifndef MHD_UNREACHABLE_
-#  define MHD_UNREACHABLE_      ((void) 0)
-#endif
 /**
  * Automatic string with the name of the current function
  */