diff --git a/c_src/bdberl_drv.h b/c_src/bdberl_drv.h
index ae294eb..9af783f 100644
--- a/c_src/bdberl_drv.h
+++ b/c_src/bdberl_drv.h
@@ -84,6 +84,8 @@
  */
 #define DB_TYPE_BTREE DB_BTREE  /* 1 */
 #define DB_TYPE_HASH  DB_HASH   /* 2 */
+#define DB_TYPE_RECNO DB_RECNO  /* 3 */
+#define DB_TYPE_QUEUE DB_QUEUE  /* 4 */
 
 /**
  * Error codes -- chosen so that we do not conflict with other packages, particularly
diff --git a/include/bdberl.hrl b/include/bdberl.hrl
index 3a4f564..670f666 100644
--- a/include/bdberl.hrl
+++ b/include/bdberl.hrl
@@ -88,6 +88,7 @@
 -define(ERROR_DB_ACTIVE,     -29007).           % Database is currently active; operation requires otherwise
 -define(ERROR_INVALID_CMD,   -29008).           % Invalid command
 -define(ERROR_INVALID_DB_TYPE,-29009).           % Invalid database type
+-define(ERROR_INVALID_VALUE, -29010).           % Invalid CRC-32 on value
 
 %% DB (user visible) error return codes.
 -define(DB_BUFFER_SMALL,           -30999).      % User memory too small for return.