diff --git a/configure.in b/configure.in
index 53f973d8e..027681c1e 100644
--- a/configure.in
+++ b/configure.in
@@ -88,7 +88,10 @@ AC_CHECK_HEADERS(sys/times.h sys/tty.h sys/types.h sys/uio.h)
 AC_CHECK_HEADERS(sys/utsname.h sys/wait.h syslog.h termio.h)
 AC_CHECK_HEADERS(termios.h tmpdir.h unistd.h util.h utmp.h utmpx.h)
 
-AC_SUBST(ac_cv_header_err_h)
+if test "$ac_cv_header_err_h" = no; then
+	EXTRA_HEADERS="$EXTRA_HEADERS err.h"
+	AC_SUBST(EXTRA_HEADERS)
+fi
 
 dnl Checks for libraries.