diff --git a/lib/libdisk/chunk.c b/lib/libdisk/chunk.c
index 199e6b74eb67..f1f95b6c0b8d 100644
--- a/lib/libdisk/chunk.c
+++ b/lib/libdisk/chunk.c
@@ -259,6 +259,7 @@ Add_Chunk(struct disk *d, long offset, u_long size, const char *name,
 			subtype = 0xa5;
 			/* FALL THROUGH */
 		case fat:
+		case efi:
 		case mbr:
 			c1 = Find_Mother_Chunk(d->chunks, offset, end, whole);
 			break;
diff --git a/lib/libdisk/disk.c b/lib/libdisk/disk.c
index d2dcafd98182..ee917be3e5b0 100644
--- a/lib/libdisk/disk.c
+++ b/lib/libdisk/disk.c
@@ -278,6 +278,9 @@ Int_Open_Disk(const char *name)
 			case 0x0e:
 				i = Add_Chunk(d, off, len, n, fat, ty, 0, 0);
 				break;
+			case 0xef:	/* EFI */
+				i = Add_Chunk(d, off, len, n, efi, ty, 0, 0);
+				break;
 			default:
 				i = Add_Chunk(d, off, len, n, mbr, ty, 0, 0);
 				break;