diff --git a/smmapdfw/configure b/smmapdfw/configure
index e3afb0c..c6c92f7 100755
--- a/smmapdfw/configure
+++ b/smmapdfw/configure
@@ -19075,6 +19075,217 @@ fi
 fi
 
 
+echo "$as_me:$LINENO: checking for __db_ndbm_open in -ldb" >&5
+echo $ECHO_N "checking for __db_ndbm_open in -ldb... $ECHO_C" >&6
+if test "${ac_cv_lib_db___db_ndbm_open+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-ldb  $LIBS"
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+/* Override any gcc2 internal prototype to avoid an error.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+/* We use char because int might match the return type of a gcc2
+   builtin and then its argument prototype would still apply.  */
+char __db_ndbm_open ();
+int
+main ()
+{
+__db_ndbm_open ();
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_c_werror_flag"			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest$ac_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_lib_db___db_ndbm_open=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_cv_lib_db___db_ndbm_open=no
+fi
+rm -f conftest.err conftest.$ac_objext \
+      conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+echo "$as_me:$LINENO: result: $ac_cv_lib_db___db_ndbm_open" >&5
+echo "${ECHO_T}$ac_cv_lib_db___db_ndbm_open" >&6
+if test $ac_cv_lib_db___db_ndbm_open = yes; then
+   LIBS="$LIBS -ldb"
+else
+  echo "$as_me:$LINENO: checking for __db_ndbm_open in -ldb41" >&5
+echo $ECHO_N "checking for __db_ndbm_open in -ldb41... $ECHO_C" >&6
+if test "${ac_cv_lib_db41___db_ndbm_open+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-ldb41  $LIBS"
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+/* Override any gcc2 internal prototype to avoid an error.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+/* We use char because int might match the return type of a gcc2
+   builtin and then its argument prototype would still apply.  */
+char __db_ndbm_open ();
+int
+main ()
+{
+__db_ndbm_open ();
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_c_werror_flag"			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest$ac_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_lib_db41___db_ndbm_open=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_cv_lib_db41___db_ndbm_open=no
+fi
+rm -f conftest.err conftest.$ac_objext \
+      conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+echo "$as_me:$LINENO: result: $ac_cv_lib_db41___db_ndbm_open" >&5
+echo "${ECHO_T}$ac_cv_lib_db41___db_ndbm_open" >&6
+if test $ac_cv_lib_db41___db_ndbm_open = yes; then
+   LIBS="$LIBS -ldb41"
+else
+  echo "$as_me:$LINENO: checking for __db_ndbm_open in -ldb42" >&5
+echo $ECHO_N "checking for __db_ndbm_open in -ldb42... $ECHO_C" >&6
+if test "${ac_cv_lib_db42___db_ndbm_open+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-ldb42  $LIBS"
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+/* Override any gcc2 internal prototype to avoid an error.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+/* We use char because int might match the return type of a gcc2
+   builtin and then its argument prototype would still apply.  */
+char __db_ndbm_open ();
+int
+main ()
+{
+__db_ndbm_open ();
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_c_werror_flag"			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest$ac_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_lib_db42___db_ndbm_open=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_cv_lib_db42___db_ndbm_open=no
+fi
+rm -f conftest.err conftest.$ac_objext \
+      conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+echo "$as_me:$LINENO: result: $ac_cv_lib_db42___db_ndbm_open" >&5
+echo "${ECHO_T}$ac_cv_lib_db42___db_ndbm_open" >&6
+if test $ac_cv_lib_db42___db_ndbm_open = yes; then
+   LIBS="$LIBS -ldb42"
+else
+   { { echo "$as_me:$LINENO: error: *** Berkeley DB not found" >&5
+echo "$as_me: error: *** Berkeley DB not found" >&2;}
+   { (exit 1); exit 1; }; }
+
+fi
+
+
+fi
+
+
+fi
+
+
 
 echo "$as_me:$LINENO: checking for inet_aton in -lresolv" >&5
 echo $ECHO_N "checking for inet_aton in -lresolv... $ECHO_C" >&6
diff --git a/smmapdfw/configure.ac b/smmapdfw/configure.ac
index 0be7a27..7981bf9 100644
--- a/smmapdfw/configure.ac
+++ b/smmapdfw/configure.ac
@@ -73,6 +73,17 @@ AC_CHECK_LIB(pthread, pthread_create,
              )
 )
 
+AC_CHECK_LIB([db], [__db_ndbm_open],
+             [ LIBS="$LIBS -ldb" ],
+             AC_CHECK_LIB([db41], [__db_ndbm_open],
+                          [ LIBS="$LIBS -ldb41" ],
+                          AC_CHECK_LIB([db42], [__db_ndbm_open],
+                                       [ LIBS="$LIBS -ldb42" ],
+                                       [ AC_MSG_ERROR([*** Berkeley DB not found]) ]
+                          )
+             )
+)
+
 AC_CHECK_LIB([resolv], [inet_aton])
 AC_CHECK_LIB([socket], [connect])
 
diff --git a/smmapdfw/modules/verify/Makefile.am b/smmapdfw/modules/verify/Makefile.am
index 9fb9be8..730cdaf 100644
--- a/smmapdfw/modules/verify/Makefile.am
+++ b/smmapdfw/modules/verify/Makefile.am
@@ -1,5 +1,5 @@
 lib_LTLIBRARIES = libverify_worker.la
 libverify_worker_la_SOURCES = verify_worker.c
-libverify_worker_la_LIBADD = ../../libsmmapdfw/libsmmapdfw.la -ldb
+libverify_worker_la_LIBADD = ../../libsmmapdfw/libsmmapdfw.la
 
 INCLUDES = -I../../libsmmapdfw
diff --git a/smmapdfw/modules/verify/Makefile.in b/smmapdfw/modules/verify/Makefile.in
index 38b3031..1bc279a 100644
--- a/smmapdfw/modules/verify/Makefile.in
+++ b/smmapdfw/modules/verify/Makefile.in
@@ -88,7 +88,7 @@ VERSION = @VERSION@
 
 lib_LTLIBRARIES = libverify_worker.la
 libverify_worker_la_SOURCES = verify_worker.c
-libverify_worker_la_LIBADD = ../../libsmmapdfw/libsmmapdfw.la -ldb
+libverify_worker_la_LIBADD = ../../libsmmapdfw/libsmmapdfw.la
 
 INCLUDES = -I../../libsmmapdfw
 mkinstalldirs = $(SHELL) $(top_srcdir)/mkinstalldirs