Index: src/OFBlock.m
==================================================================
--- src/OFBlock.m
+++ src/OFBlock.m
@@ -14,10 +14,15 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
 #import "OFBlock.h"
+
+@protocol RetainRelease
+- retain;
+- (void)release;
+@end
 
 #if defined(OF_GNU_RUNTIME) || defined(OF_OBJFW_RUNTIME)
 struct objc_abi_class {
 	struct objc_abi_metaclass *metaclass;
 	const char *superclass, *name;

Index: src/OFString+XMLUnescaping.h
==================================================================
--- src/OFString+XMLUnescaping.h
+++ src/OFString+XMLUnescaping.h
@@ -52,14 +52,16 @@
  * \param h An OFXMLUnescapingDelegate as a handler for unknown entities
  */
 - (OFString*)stringByXMLUnescapingWithDelegate:
     (id <OFStringXMLUnescapingDelegate>)delegate;
 
+#ifdef OF_HAVE_BLOCKS
 /**
  * Unescapes XML in the string and uses the specified block for unknown
  * entities.
  *
  * \param h A block as a handler for unknown entities
  */
 - (OFString*)stringByXMLUnescapingWithBlock:
     (of_string_xml_unescaping_block_t)block;
+#endif
 @end