diff --git a/Build.sh b/Build.sh
index 60263ea..3a83178 100644
--- a/Build.sh
+++ b/Build.sh
@@ -1,5 +1,5 @@
 #!/bin/sh
-srcversion='$MirOS: src/bin/mksh/Build.sh,v 1.684 2015/07/09 19:28:17 tg Exp $'
+srcversion='$MirOS: src/bin/mksh/Build.sh,v 1.685 2015/07/09 19:46:40 tg Exp $'
 #-
 # Copyright (c) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,
 #		2011, 2012, 2013, 2014, 2015
@@ -836,6 +836,8 @@ OS/2)
 	check_categories="$check_categories nosymlink"
 	: ${CC=gcc}
 	: ${SIZE=: size}
+	add_cppflags -DMKSH_UNEMPLOYED
+	add_cppflags -DMKSH_NOPROSPECTOFWORK
 	;;
 OSF1)
 	HAVE_SIG_T=0	# incompatible
diff --git a/exec.c b/exec.c
index bf8c4a8..7f97c07 100644
--- a/exec.c
+++ b/exec.c
@@ -23,7 +23,7 @@
 
 #include "sh.h"
 
-__RCSID("$MirOS: src/bin/mksh/exec.c,v 1.155 2015/07/06 17:48:31 tg Exp $");
+__RCSID("$MirOS: src/bin/mksh/exec.c,v 1.156 2015/07/09 19:46:41 tg Exp $");
 
 #ifndef MKSH_DEFAULT_EXECSHELL
 #define MKSH_DEFAULT_EXECSHELL	"/bin/sh"
@@ -930,10 +930,15 @@ scriptexec(struct op *tp, const char **ap)
 		/* restore begin of shebang position (buf+0 or buf+3) */
 		cp = buf + n;
 		/* bail out if no shebang magic found */
-		if ((cp[0] != '#') || (cp[1] != '!'))
+		if (cp[0] == '#' && cp[1] == '!')
+			cp += 2;
+#ifdef __OS2__
+		else if (!strncmp(cp, Textproc, 7) &&
+		    (cp[7] == ' ' || cp[7] == '\t'))
+			cp += 8;
+#endif
+		else
 			goto noshebang;
-
-		cp += 2;
 		/* skip whitespace before shell name */
 		while (*cp == ' ' || *cp == '\t')
 			++cp;
diff --git a/funcs.c b/funcs.c
index 1be28e4..1a9f6ed 100644
--- a/funcs.c
+++ b/funcs.c
@@ -38,7 +38,7 @@
 #endif
 #endif
 
-__RCSID("$MirOS: src/bin/mksh/funcs.c,v 1.277 2015/07/06 17:48:32 tg Exp $");
+__RCSID("$MirOS: src/bin/mksh/funcs.c,v 1.278 2015/07/09 19:46:41 tg Exp $");
 
 #if HAVE_KILLPG
 /*
@@ -160,6 +160,9 @@ const struct builtin mkshbuiltins[] = {
 #ifdef __MirBSD__
 	/* alias to "true" for historical reasons */
 	{"domainname", c_true},
+#endif
+#ifdef __OS2__
+	{Textproc, c_true},
 #endif
 	{NULL, (int (*)(const char **))NULL}
 };
diff --git a/main.c b/main.c
index d45c83a..3e4dee0 100644
--- a/main.c
+++ b/main.c
@@ -34,7 +34,7 @@
 #include <locale.h>
 #endif
 
-__RCSID("$MirOS: src/bin/mksh/main.c,v 1.297 2015/07/09 19:28:20 tg Exp $");
+__RCSID("$MirOS: src/bin/mksh/main.c,v 1.298 2015/07/09 19:46:42 tg Exp $");
 
 extern char **environ;
 
@@ -454,7 +454,19 @@ main_init(int argc, const char *argv[], Source **sp, struct block **lp)
 			kshname = argv[argi++];
 	} else if (argi < argc && !Flag(FSTDIN)) {
 		s = pushs(SFILE, ATEMP);
+#ifdef __OS2__
+		/*
+		 * A bug in OS/2 extproc (like shebang) handling makes
+		 * it not pass the full pathname of a script, so we need
+		 * to search for it. This changes the behaviour of a
+		 * simple "mksh foo", but can't be helped.
+		 */
+		s->file = search_path(argv[argi++], path, X_OK, NULL);
+		if (!s->file || !*s->file)
+			s->file = argv[argi - 1];
+#else
 		s->file = argv[argi++];
+#endif
 		s->u.shf = shf_open(s->file, O_RDONLY, 0,
 		    SHF_MAPHI | SHF_CLEXEC);
 		if (s->u.shf == NULL) {
diff --git a/sh.h b/sh.h
index c6807cd..f2f2d09 100644
--- a/sh.h
+++ b/sh.h
@@ -169,7 +169,7 @@
 #endif
 
 #ifdef EXTERN
-__RCSID("$MirOS: src/bin/mksh/sh.h,v 1.735 2015/07/09 19:28:21 tg Exp $");
+__RCSID("$MirOS: src/bin/mksh/sh.h,v 1.736 2015/07/09 19:46:43 tg Exp $");
 #endif
 #define MKSH_VERSION "R51 2015/07/06"
 
@@ -253,7 +253,8 @@ typedef MKSH_TYPEDEF_SSIZE_T ssize_t;
 
 /* extra types */
 
-#if !HAVE_GETRUSAGE
+/* getrusage does not exist on OS/2 kLIBC */
+#if !HAVE_GETRUSAGE && !defined(__OS2__)
 #undef rusage
 #undef RUSAGE_SELF
 #undef RUSAGE_CHILDREN
@@ -829,6 +830,9 @@ EXTERN const char T_typeset[] E_INIT("=typeset");
 EXTERN const char Talias[] E_INIT("alias");
 EXTERN const char Tunalias[] E_INIT("unalias");
 EXTERN const char Tcat[] E_INIT("cat");
+#ifdef __OS2__
+EXTERN const char Textproc[] E_INIT("extproc");
+#endif
 EXTERN const char Tsgset[] E_INIT("*=set");
 #define Tset		(Tsgset + 2)		/* "set" */
 EXTERN const char Tsgexport[] E_INIT("*=export");