--- cvs-1.12.12/configure.in
+++ cvs-1.12.12/configure.in
@@ -84,7 +84,7 @@
 AC_EXEEXT
 
 AC_PATH_PROG(PERL, perl, no)
-AC_PATH_PROG(CSH, csh, no)
+AC_PATH_PROG(CSH, csh, /usr/bin/csh)
 # for contrib/rcs2log.sh & src/cvsbug.in.
 AC_PATH_PROG(MKTEMP, mktemp, mktemp)
 if test x"$MKTEMP" = xmktemp; then