diff --git a/configs/releng/build.sh b/configs/releng/build.sh
index 7eb2d1e..4b56542 100755
--- a/configs/releng/build.sh
+++ b/configs/releng/build.sh
@@ -170,7 +170,7 @@ make_efi() {
     # EFI Shell 2.0 for UEFI 2.3+
     curl -o ${work_dir}/iso/EFI/shellx64_v2.efi https://raw.githubusercontent.com/tianocore/edk2/master/ShellBinPkg/UefiShell/X64/Shell.efi
     # EFI Shell 1.0 for non UEFI 2.3+
-    curl -o ${work_dir}/iso/EFI/shellx64_v1.efi https://raw.githubusercontent.com/tianocore/edk2/master/EdkShellBinPkg/FullShell/X64/Shell_Full.efi
+    curl -o ${work_dir}/iso/EFI/shellx64_v1.efi https://raw.githubusercontent.com/tianocore/edk2/UDK2018/EdkShellBinPkg/FullShell/X64/Shell_Full.efi
 }
 
 # Prepare efiboot.img::/EFI for "El Torito" EFI boot mode