@@ -129,10 +129,16 @@
 #define OF_IVAR_OFFSET(ivar) ((intptr_t)&ivar - (intptr_t)self)
 #define OF_GETTER(ivar, atomic) \
 	return objc_getProperty(self, _cmd, OF_IVAR_OFFSET(ivar), atomic);
 #define OF_SETTER(ivar, value, atomic, copy) \
 	objc_setProperty(self, _cmd, OF_IVAR_OFFSET(ivar), value, atomic, copy);
+
+#ifdef OF_HAVE_CLASS_EXTENSIONS
+# define OF_PRIVATE_CATEGORY
+#else
+# define OF_PRIVATE_CATEGORY Private
+#endif
 
 static OF_INLINE uint16_t OF_CONST_FUNC
 OF_BSWAP16_CONST(uint16_t i)
 {
 	return (i & UINT16_C(0xFF00)) >> 8 |