diff --git a/[refs] b/[refs]
index 474fd5aa9f92..b1bef0c05a45 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: ae6fef1790512edde8776ee2a158b1e13d085f61
+refs/heads/master: 160d83781a32e94a1e337efd6722939001e62398
diff --git a/trunk/arch/openrisc/kernel/head.S b/trunk/arch/openrisc/kernel/head.S
index b357e7f79aca..1d3c9c28ac25 100644
--- a/trunk/arch/openrisc/kernel/head.S
+++ b/trunk/arch/openrisc/kernel/head.S
@@ -19,6 +19,7 @@
 #include <linux/threads.h>
 #include <linux/errno.h>
 #include <linux/init.h>
+#include <linux/serial_reg.h>
 #include <asm/processor.h>
 #include <asm/page.h>
 #include <asm/mmu.h>