diff --git a/lxd/instance/drivers/edk2/edk2.go b/lxd/instance/drivers/edk2/edk2.go
index 1c8f09116d36..fbab894ba7fc 100644
--- a/lxd/instance/drivers/edk2/edk2.go
+++ b/lxd/instance/drivers/edk2/edk2.go
@@ -84,6 +84,13 @@ var architectureInstallations = map[int][]Installation{
 				{Code: "seabios.bin", Vars: "seabios.bin"},
 			},
 		},
+	}, {
+		Paths: GetenvEdk2Paths("/usr/share/seabios"),
+		Usage: map[FirmwareUsage][]FirmwarePair{
+			CSM: {
+				{Code: "bios-256k.bin", Vars: "bios-256k.bin"},
+			},
+		},
 	}, {
 		Paths: GetenvEdk2Paths("/usr/share/OVMF/x64"),
 		Usage: map[FirmwareUsage][]FirmwarePair{