diff --git a/lib/db_ido_mysql/idomysqlconnection.cpp b/lib/db_ido_mysql/idomysqlconnection.cpp
index 59bfef4ec..92d7f61a9 100644
--- a/lib/db_ido_mysql/idomysqlconnection.cpp
+++ b/lib/db_ido_mysql/idomysqlconnection.cpp
@@ -303,7 +303,8 @@ void IdoMysqlConnection::Reconnect(void)
 
 		Log(LogCritical, "IdoMysqlConnection")
 		    << "Schema version '" << version << "' does not match the required version '"
-		    << IDO_COMPAT_SCHEMA_VERSION << "' (or newer)! Please check the upgrade documentation.";
+		    << IDO_COMPAT_SCHEMA_VERSION << "' (or newer)! Please check the upgrade documentation at "
+		    << "https://docs.icinga.com/icinga2/latest/doc/module/icinga2/chapter/upgrading-icinga-2#upgrading-mysql-db";
 
 		BOOST_THROW_EXCEPTION(std::runtime_error("Schema version mismatch."));
 	}
diff --git a/lib/db_ido_pgsql/idopgsqlconnection.cpp b/lib/db_ido_pgsql/idopgsqlconnection.cpp
index 0d0cf3bd6..28eca8cb3 100644
--- a/lib/db_ido_pgsql/idopgsqlconnection.cpp
+++ b/lib/db_ido_pgsql/idopgsqlconnection.cpp
@@ -264,7 +264,8 @@ void IdoPgsqlConnection::Reconnect(void)
 
 		Log(LogCritical, "IdoPgsqlConnection")
 		    << "Schema version '" << version << "' does not match the required version '"
-		    << IDO_COMPAT_SCHEMA_VERSION << "' (or newer)! Please check the upgrade documentation.";
+		    << IDO_COMPAT_SCHEMA_VERSION << "' (or newer)! Please check the upgrade documentation at "
+		    << "https://docs.icinga.com/icinga2/latest/doc/module/icinga2/chapter/upgrading-icinga-2#upgrading-postgresql-db";
 
 		BOOST_THROW_EXCEPTION(std::runtime_error("Schema version mismatch."));
 	}