diff --git a/arch/alpha/lib/csum_partial_copy.c b/arch/alpha/lib/csum_partial_copy.c
index dc68efbe93671b736599b4789d10e74abdcfca07..1931a04af85a22037a9704bb2c9e6c20108d96d6 100644
--- a/arch/alpha/lib/csum_partial_copy.c
+++ b/arch/alpha/lib/csum_partial_copy.c
@@ -13,6 +13,7 @@
 #include <linux/types.h>
 #include <linux/string.h>
 #include <linux/uaccess.h>
+#include <net/checksum.h>
 
 
 #define ldq_u(x,y) \