diff --git a/bin/sh/machdep.h b/bin/sh/machdep.h
new file mode 100644
index 00000000000..20aadd04180
--- /dev/null
+++ b/bin/sh/machdep.h
@@ -0,0 +1,52 @@
+/*-
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Kenneth Almquist.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)machdep.h	8.2 (Berkeley) 5/4/95
+ * $FreeBSD$
+ */
+
+/*
+ * Most machines require the value returned from malloc to be aligned
+ * in some way.  The following macro will get this right on many machines.
+ */
+
+#ifndef ALIGN
+union align {
+	int i;
+	char *cp;
+};
+
+#define ALIGN(nbytes)	(((nbytes) + sizeof(union align) - 1) & ~(sizeof(union align) - 1))
+#endif
diff --git a/bin/sh/memalloc.c b/bin/sh/memalloc.c
index c3e5fcaecf7..a50d6617deb 100644
--- a/bin/sh/memalloc.c
+++ b/bin/sh/memalloc.c
@@ -42,12 +42,11 @@ static char sccsid[] = "@(#)memalloc.c	8.3 (Berkeley) 5/4/95";
 #include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");
 
-#include <sys/param.h>
-
 #include "shell.h"
 #include "output.h"
 #include "memalloc.h"
 #include "error.h"
+#include "machdep.h"
 #include "mystring.h"
 #include "expand.h"
 #include <stdlib.h>
@@ -140,8 +139,8 @@ stalloc(int nbytes)
 		sp = ckmalloc(sizeof(struct stack_block) - MINSIZE + 
 		    blocksize);
 		sp->prev = stackp;
-		stacknxt = (char *)ALIGN(sp->space);
-		stacknleft = blocksize - (stacknxt - sp->space);
+		stacknxt = sp->space;
+		stacknleft = blocksize;
 		stackp = sp;
 		INTON;
 	}
diff --git a/bin/sh/nodes.c.pat b/bin/sh/nodes.c.pat
index e5a2287f195..2fc79f038c5 100644
--- a/bin/sh/nodes.c.pat
+++ b/bin/sh/nodes.c.pat
@@ -37,8 +37,6 @@
  * $FreeBSD$
  */
 
-#include <sys/param.h>
-
 #include <stdlib.h>
 /*
  * Routine for dealing with parsed shell commands.
@@ -47,6 +45,7 @@
 #include "shell.h"
 #include "nodes.h"
 #include "memalloc.h"
+#include "machdep.h"
 #include "mystring.h"