diff --git a/README.md b/README.md
index edf15ce..3df22fa 100644
--- a/README.md
+++ b/README.md
@@ -13,11 +13,6 @@ Gameplay
 Gameplay is as in hello wordl's default daily mode. `x` under a letter marks it
 as incorrect and `^` marks it as being in the wrong place.
 
-Missing features
-----------------
-
-- Ability to set the seed manually
-
 Word lists
 ----------
 The words lists are taken from
diff --git a/dosdl.asm b/dosdl.asm
index f83b4ef..593cf5d 100644
--- a/dosdl.asm
+++ b/dosdl.asm
@@ -73,6 +73,44 @@ parse_arguments:
 	test cx, cx
 	jz seed_rng_date
 
+seed_rng_argument:
+	xor ax, ax
+	xor dx, dx
+	mov bp, mull32
+	call store32
+
+	.loop:
+		xor dx, dx
+		mov ax, 10
+		mov bp, mulr32
+		call store32
+		call mul32
+		mov bp, addl32
+		call store32
+
+		lodsb
+		cmp al, '0'
+		jb print_help
+		cmp al, '9'
+		ja print_help
+
+		sub al, '0'
+
+		xor ah, ah
+		xor dx, dx
+		mov bp, addr32
+		call store32
+
+		call add32
+		mov bp, mull32
+		call store32
+
+		loop .loop
+
+	mov bp, rng_seed
+	call store32
+	jmp select_target
+
 print_help:
 	mov ah, 9
 	mov dx, help_str
@@ -1052,7 +1090,7 @@ guesses_str db ' guesses.$'
 guess_str db ' guess.$'
 
 help_str:
-	db 'Usage: dosdl [/h | /u | /l | /?]', 13, 10
+	db 'Usage: dosdl [/h | /u | /l | /?] [seed]', 13, 10
 	db '/h   Enable hard mode.', 13, 10
 	db '/u   Enable ultra hard mode.', 13, 10
 	db '/l   Display license info.', 13, 10