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-rw-r--r--sound/pci/asihpi/hpios.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/sound/pci/asihpi/hpios.h b/sound/pci/asihpi/hpios.h
index 03273e729f99..2f605e34bad0 100644
--- a/sound/pci/asihpi/hpios.h
+++ b/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