diff -Nburp tcsh-6.20.00.orig/sh.c tcsh-6.20.00/sh.c
--- tcsh-6.20.00.orig/sh.c	2016-09-12 19:33:54.000000000 +0300
+++ tcsh-6.20.00/sh.c	2017-07-18 11:04:32.963868814 +0300
@@ -836,7 +836,7 @@ main(int argc, char **argv)
 	const char *tmpdir = getenv ("TMPDIR");
 	if (!tmpdir)
 	    tmpdir = "/tmp";
-	shtemp = Strspl(SAVE(tmpdir), SAVE("/sh" TMP_TEMPLATE)); /* For << */
+	shtemp = Strspl(SAVE(tmpdir), SAVE("/tcsh" TMP_TEMPLATE)); /* For << */
     }
 #else /* !HAVE_MKSTEMP */
     shtemp = Strspl(STRtmpsh, doldol);	/* For << */