diff --git a/exec.c b/exec.c
index fd8de2c..7ed7183 100644
--- a/exec.c
+++ b/exec.c
@@ -23,7 +23,7 @@
 
 #include "sh.h"
 
-__RCSID("$MirOS: src/bin/mksh/exec.c,v 1.190 2017/03/12 02:04:12 tg Exp $");
+__RCSID("$MirOS: src/bin/mksh/exec.c,v 1.191 2017/03/22 00:20:51 tg Exp $");
 
 #ifndef MKSH_DEFAULT_EXECSHELL
 #define MKSH_DEFAULT_EXECSHELL	MKSH_UNIXROOT "/bin/sh"
@@ -1135,7 +1135,11 @@ findcom(const char *name, int flags)
 	char *fpath;
 	union mksh_cchack npath;
 
-	if (mksh_vdirsep(name)) {
+	if (mksh_vdirsep(name)
+#ifdef __OS2__
+	    && (strcmp(name, T_builtin) != 0)
+#endif
+	    ) {
 		insert = 0;
 		/* prevent FPATH search below */
 		flags &= ~FC_FUNC;
diff --git a/sh.h b/sh.h
index d981d42..80dc810 100644
--- a/sh.h
+++ b/sh.h
@@ -175,9 +175,9 @@
 #endif
 
 #ifdef EXTERN
-__RCSID("$MirOS: src/bin/mksh/sh.h,v 1.796 2017/03/19 22:31:29 tg Exp $");
+__RCSID("$MirOS: src/bin/mksh/sh.h,v 1.797 2017/03/22 00:20:53 tg Exp $");
 #endif
-#define MKSH_VERSION "R54 2017/03/19"
+#define MKSH_VERSION "R54 2017/03/21"
 
 /* arithmetic types: C implementation */
 #if !HAVE_CAN_INTTYPES
@@ -865,6 +865,7 @@ EXTERN const char Tbad_bsize[] E_INIT("bad shf/buf/bsize");
 EXTERN const char Tbad_sig_ss[] E_INIT("%s: bad signal '%s'");
 #define Tbad_sig_s (Tbad_sig_ss + 4)
 EXTERN const char T__builtin[] E_INIT("-\\builtin");
+#define T_builtin (T__builtin + 1)
 #define Tbuiltin (T__builtin + 2)
 EXTERN const char Toomem[] E_INIT("can't allocate %zu data bytes");
 EXTERN const char Tcant_cd[] E_INIT("restricted shell - can't cd");
@@ -1012,6 +1013,7 @@ EXTERN const char T_devtty[] E_INIT("/dev/tty");
 #define Tbad_sig_ss "%s: bad signal '%s'"
 #define Tbad_sig_s "bad signal '%s'"
 #define T__builtin "-\\builtin"
+#define T_builtin "\\builtin"
 #define Tbuiltin "builtin"
 #define Toomem "can't allocate %zu data bytes"
 #define Tcant_cd "restricted shell - can't cd"