diff --git a/headers/os/drivers/bus/SCSI.h b/headers/os/drivers/bus/SCSI.h
index d1e4112f45..5445dc609b 100644
--- a/headers/os/drivers/bus/SCSI.h
+++ b/headers/os/drivers/bus/SCSI.h
@@ -413,7 +413,7 @@ typedef struct scsi_for_sim_interface {
 // controller name (required, string)
 #define SCSI_DESCRIPTION_CONTROLLER_NAME "controller_name"
 
-typedef struct scsi_sim_cookie *scsi_sim_cookie;
+typedef void * scsi_sim_cookie;
 
 // SIM interface
 // SCSI controller drivers must provide this interface