@@ -73,12 +73,10 @@
 	AC_MSG_RESULT(yes)
 	], [
 	AC_MSG_RESULT(no)
 	OBJCFLAGS="$old_OBJCFLAGS"
 	])
-AC_CHECK_FUNC(_Block_copy,
-	AC_DEFINE(HAVE_BLOCK_COPY, 1, [Whether we have _Block_copy]))
 
 AC_CHECK_HEADERS([objfw-rt.h objc/objc.h])
 
 test x"$ac_cv_header_objfw_rt_h" = x"yes" && objc_runtime="ObjFW-RT"