Remember to run +load methods in categories, as well as classes.

category_loader.c

@@ -5,6 +5,8 @@
 #define BUFFER_TYPE struct objc_category
 #include "buffer.h"
 
+void objc_send_load_message(Class class);
+
 static void register_methods(struct objc_class *cls, struct objc_method_list *l)
 {
 	if (NULL == l) { return; }
@@ -32,6 +34,7 @@ static void load_category(struct objc_category *cat, struct objc_class *class)
 		cat->protocols->next = class->protocols;
 		class->protocols = cat->protocols;
 	}
+	objc_send_load_message(class);
 }
 
 static BOOL try_load_category(struct objc_category *cat)