diff --git a/include/asm-x86/io.h b/include/asm-x86/io.h
index 6fa150f..599cad3 100644
--- a/include/asm-x86/io.h
+++ b/include/asm-x86/io.h
@@ -1,3 +1,5 @@
+#define ARCH_HAS_IOREMAP_WC
+
 #ifdef CONFIG_X86_32
 # include "io_32.h"
 #else
@@ -5,4 +7,5 @@
 #endif
 extern int ioremap_change_attr(unsigned long vaddr, unsigned long size,
 				unsigned long prot_val);
+extern void __iomem * ioremap_wc(unsigned long offset, unsigned long size);