diff --git a/patches/notes.txt b/patches/notes.txt
index aaef8b4..7d6eed4 100644
--- a/patches/notes.txt
+++ b/patches/notes.txt
@@ -47,3 +47,8 @@ fastout.patch
 v2_as.patch
     Defines mount as _mount, gtty as _gtty, so that these symbols will not
     conflict with the pre-defined symbols in the V2 assembler.
+
+shell-s2.patch
+    A patch to the jun72 sh.s sources to make it build an identical
+    shell as the s2 /bin/sh (different only in the padding bytes).
+
diff --git a/patches/shell-s2.patch b/patches/shell-s2.patch
new file mode 100644
index 0000000..5dfbf4f
--- /dev/null
+++ b/patches/shell-s2.patch
@@ -0,0 +1,21 @@
+1a2,3
+> .. = 40014
+> 
+146a149,150
+> 	rts	r5
+> 
+235,242d238
+< 	sys	stat; binpb; inbuf / if can't execute does it
+< 		                   / exist?
+< 	bes	2f / branch if it doesn't
+< 	mov	$shell,parp-2 / does exist, not executable
+< 	mov	$binpb,parp / so it must be
+< 	sys	exec; shell; parp-2 / a command file, get it with
+< 		                    / sh /bin/x (if x name of file)
+< 2:
+259a256,257
+> 	cmp	r0,$'* / is it *
+> 	beq	3f
+362,363d359
+< shell:
+< 	</bin/sh\0>