diff --git a/include/asm-i386/checksum.h b/include/asm-i386/checksum.h
index 641342002bcd39e3835793394b3961b59efd8427..f949e44c2a35d290655258c83cf3f0f5731e7e20 100644
--- a/include/asm-i386/checksum.h
+++ b/include/asm-i386/checksum.h
@@ -3,6 +3,8 @@
 
 #include <linux/in6.h>
 
+#include <asm/uaccess.h>
+
 /*
  * computes the checksum of a memory block at buff, length len,
  * and adds in "sum" (32-bit)