diff -up ksh-20120801/src/cmd/ksh93/sh/main.c.fixargs ksh-20120801/src/cmd/ksh93/sh/main.c

--- ksh-20120801/src/cmd/ksh93/sh/main.c.fixargs	2013-12-31 11:32:14.917874134 +0100

+++ ksh-20120801/src/cmd/ksh93/sh/main.c	2013-12-31 11:32:58.028847126 +0100

@@ -757,7 +757,7 @@ static void fixargs(char **argv, int mod

 		offset += size;

 		buff[offset++] = ' ';

 	}

-	buff[offset-1] = 0;

+	memset(&buff[offset - 1], 0, command_len - offset + 1);

 #   ifdef PSTAT

 	un.pst_command = stakptr(0);

 	pstat(PSTAT_SETCMD,un,0,0,0);