diff --git a/drivers/scsi/hpsa.h b/drivers/scsi/hpsa.h
index e898193..621a153 100644
--- a/drivers/scsi/hpsa.h
+++ b/drivers/scsi/hpsa.h
@@ -72,6 +72,7 @@
 	unsigned int intr[4];
 	unsigned int msix_vector;
 	unsigned int msi_vector;
+	int intr_mode; /* either PERF_MODE_INT or SIMPLE_MODE_INT */
 	struct access_method access;
 
 	/* queue and queue Info */