diff --git a/src/raspberrypi/controllers/sasidev_ctrl.cpp b/src/raspberrypi/controllers/sasidev_ctrl.cpp
index 2676c19d..652ae0fe 100644
--- a/src/raspberrypi/controllers/sasidev_ctrl.cpp
+++ b/src/raspberrypi/controllers/sasidev_ctrl.cpp
@@ -1082,6 +1082,7 @@ void SASIDEV::FlushUnit()
 
 int SASIDEV::GetEffectiveLun() const
 {
-	return (ctrl.cmd[1] >> 5) & 0x07;
+	// RaSCSI only supports a single SASI LUN
+	return (ctrl.cmd[1] >> 5) & 0x01;
 }