Index: src/OFBlock.m
==================================================================
--- src/OFBlock.m
+++ src/OFBlock.m
@@ -16,14 +16,16 @@
 #include <stdlib.h>
 #include <string.h>
 
 #import "OFBlock.h"
 
+/// \cond internal
 @protocol RetainRelease
 - retain;
 - (void)release;
 @end
+/// \endcond
 
 #if defined(OF_GNU_RUNTIME) || defined(OF_OBJFW_RUNTIME)
 struct objc_abi_class {
 	struct objc_abi_metaclass *metaclass;
 	const char *superclass, *name;