diff --git a/include/linux/kernelcapi.h b/include/linux/kernelcapi.h
index 9be37da..e985ba6 100644
--- a/include/linux/kernelcapi.h
+++ b/include/linux/kernelcapi.h
@@ -41,7 +41,7 @@
 u16 capi20_get_version(u32 contr, struct capi_version *verp);
 u16 capi20_get_serial(u32 contr, u8 serial[CAPI_SERIAL_LEN]);
 u16 capi20_get_profile(u32 contr, struct capi_profile *profp);
-int capi20_manufacturer(unsigned int cmd, void __user *data);
+int capi20_manufacturer(unsigned long cmd, void __user *data);
 
 #define CAPICTR_UP			0
 #define CAPICTR_DOWN			1