diff --git a/drivers/s390/s390mach.h b/drivers/s390/s390mach.h
index d3ca428..ca681f9 100644
--- a/drivers/s390/s390mach.h
+++ b/drivers/s390/s390mach.h
@@ -105,4 +105,8 @@
 #define ED_ETR_SYNC	12	/* External damage ETR sync check */
 #define ED_ETR_SWITCH	13	/* External damage ETR switch to local */
 
+struct pt_regs;
+
+void s390_handle_mcck(void);
+void s390_do_machine_check(struct pt_regs *regs);
 #endif /* __s390mach */