diff --git a/src/common/db_backend_lmdb.cpp b/src/common/db_backend_lmdb.cpp
index f27a696d..726b47a3 100644
--- a/src/common/db_backend_lmdb.cpp
+++ b/src/common/db_backend_lmdb.cpp
@@ -49,7 +49,8 @@ namespace tools
       res = mdb_env_create(&m_penv);
       CHECK_AND_ASSERT_MESS_LMDB_DB(res, false, "Unable to mdb_env_create");
       
-      res = mdb_env_set_maxdbs(m_penv, 15);
+      MDB_dbi max_dbs = 15;
+      res = mdb_env_set_maxdbs(m_penv, max_dbs);
       CHECK_AND_ASSERT_MESS_LMDB_DB(res, false, "Unable to mdb_env_set_maxdbs");
 
       m_path = path_;
@@ -59,8 +60,23 @@ namespace tools
 
       CHECK_AND_ASSERT_MES(tools::create_directories_if_necessary(m_path), false, "create_directories_if_necessary failed: " << m_path);
 
-      res = mdb_env_open(m_penv, m_path.c_str(), MDB_NORDAHEAD /*| MDB_NOSYNC | MDB_WRITEMAP | MDB_MAPASYNC*/, 0644);
-      CHECK_AND_ASSERT_MESS_LMDB_DB(res, false, "Unable to mdb_env_open, m_path=" << m_path);
+      unsigned int lmdb_flags = MDB_NORDAHEAD /*| MDB_NOSYNC | MDB_WRITEMAP | MDB_MAPASYNC*/;
+      mdb_mode_t lmdb_mode = 0644;
+
+      res = mdb_env_open(m_penv, m_path.c_str(), lmdb_flags, lmdb_mode);
+      if (res != MDB_SUCCESS)
+      {
+        // DB created with prev LMDB 0.9.18 cannot be opened due to huge map size set in env
+        // try to remove DB folder completely and re-open
+        boost::filesystem::remove_all(m_path);
+        CHECK_AND_ASSERT_MES(tools::create_directories_if_necessary(m_path), false, "create_directories_if_necessary failed: " << m_path);
+        res = mdb_env_create(&m_penv);
+        CHECK_AND_ASSERT_MESS_LMDB_DB(res, false, "Unable to mdb_env_create");
+        res = mdb_env_set_maxdbs(m_penv, max_dbs);
+        CHECK_AND_ASSERT_MESS_LMDB_DB(res, false, "Unable to mdb_env_set_maxdbs");
+        res = mdb_env_open(m_penv, m_path.c_str(), lmdb_flags, lmdb_mode);
+        CHECK_AND_ASSERT_MESS_LMDB_DB(res, false, "Unable to mdb_env_open, m_path=" << m_path);
+      }
 
       resize_if_needed();