diff --git a/include/scsi/scsi_transport_spi.h b/include/scsi/scsi_transport_spi.h
index 2b5930ba69ec465b43947e9e47493530448bb871..fb5a2ffae9394c15b9eaebccb91b9896bf67b54a 100644
--- a/include/scsi/scsi_transport_spi.h
+++ b/include/scsi/scsi_transport_spi.h
@@ -22,6 +22,7 @@
 
 #include <linux/config.h>
 #include <linux/transport_class.h>
+#include <linux/mutex.h>
 
 struct scsi_transport_template;
 struct scsi_target;