diff --git a/configure.ac b/configure.ac
--- a/configure.ac
+++ b/configure.ac
-AC_INIT([CADS_fits2jpeg], [1.90], [cads@iiap.res.in])
+AC_INIT([CADS_fits2jpeg], [1.95], [cads@iiap.res.in])
AC_LANG_C
AM_INIT_AUTOMAKE([-Wall -Werror])
AC_CONFIG_SRCDIR([config.h.in])
# Checks for libraries.
# Checks for header files.
-AC_CHECK_HEADERS([stdio.h stdlib.h string.h math.h])
+AC_CHECK_HEADERS([stdio.h stdlib.h string.h math.h float.h ctype.h libgen.h dirent.h])
# Checks for typedefs, structures, and compiler characteristics.