diff --git a/[refs] b/[refs]
index 4ba9f0c3e2a8..901e76479d30 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: b7f12482ca54353fbd8ea2fa3ca1ce996dcb5a3c
+refs/heads/master: 5ddc5bef5cfff111addb2b0b2967dda74a14cce4
diff --git a/trunk/sound/pci/asihpi/hpios.h b/trunk/sound/pci/asihpi/hpios.h
index 03273e729f99..2f605e34bad0 100644
--- a/trunk/sound/pci/asihpi/hpios.h
+++ b/trunk/sound/pci/asihpi/hpios.h
@@ -38,6 +38,7 @@ HPI Operating System Specific macros for Linux Kernel driver
 #include <linux/firmware.h>
 #include <linux/interrupt.h>
 #include <linux/pci.h>
+#include <linux/mutex.h>
 
 #define HPI_NO_OS_FILE_OPS