@@ -17,14 +17,12 @@
 #import "OFObject.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
-#if defined(OF_APPLE_RUNTIME) || defined(OF_GNU_RUNTIME)
+#if defined(OF_APPLE_RUNTIME)
 # import <objc/runtime.h>
-#elif defined(OF_OLD_GNU_RUNTIME)
-# import <objc/objc-api.h>
 #endif
 
 #ifdef _PSP
 # define INTMAX_MAX LONG_LONG_MAX
 #endif
@@ -79,22 +77,14 @@
 # elif defined(__arm__) || defined(__ARM__)
 #  define OF_ARM_ASM
 # endif
 #endif
 
-#if defined(OF_OLD_GNU_RUNTIME) || defined(OF_OBJFW_RUNTIME)
+#ifdef OF_OBJFW_RUNTIME
 # define objc_lookUpClass objc_lookup_class
 #endif
 
-#ifdef OF_OLD_GNU_RUNTIME
-# define class_getInstanceSize class_get_instance_size
-# define class_getName class_get_class_name
-# define class_getSuperclass class_get_super_class
-# define sel_getName sel_get_name
-# define sel_registerName sel_get_uid
-#endif
-
 #ifndef _WIN32
 # define OF_PATH_DELIMITER '/'
 #else
 # define OF_PATH_DELIMITER '\\'
 #endif