diff --git a/nixos/modules/installer/cd-dvd/iso-image.nix b/nixos/modules/installer/cd-dvd/iso-image.nix
index 76a1517d9dae..60ba783b0466 100644
--- a/nixos/modules/installer/cd-dvd/iso-image.nix
+++ b/nixos/modules/installer/cd-dvd/iso-image.nix
@@ -459,6 +459,11 @@ let
             }
           fi
         ''}
+        ${lib.optionalString config.boot.loader.grub.memtest86.enable ''
+          menuentry 'Memtest86+' --class debug {
+            linux (\$root)/boot/memtest.bin ${toString config.boot.loader.grub.memtest86.params}
+          }
+        ''}
         menuentry 'Firmware Setup' --class settings {
           fwsetup
           clear