diff --git a/configure.in b/configure.in
index b69ae5eb0..bf364f47e 100644
--- a/configure.in
+++ b/configure.in
@@ -41,6 +41,7 @@ dnl Checks for header files.
 AC_HEADER_STDC
 AC_CHECK_HEADERS(fcntl.h limits.h sys/ioctl.h sys/time.h unistd.h)
 AC_CHECK_HEADERS(sys/bitypes.h sys/filio.h sys/types.h)
+AC_CHECK_HEADERS(db.h ndbm.h)
 
 dnl Checks for typedefs, structures, and compiler characteristics.
 AC_C_CONST
@@ -76,5 +77,6 @@ AC_OUTPUT(Makefile 		\
 	lib/krb5/Makefile	\
 	lib/krb5/error/Makefile	\
 	lib/krb5/error/compile_et \
+	lib/hdb/Makefile	\
 	kuser/Makefile		\
 	kdc/Makefile)