diff --git a/include/types/hlua.h b/include/types/hlua.h
index cfeb767..b2c3997 100644
--- a/include/types/hlua.h
+++ b/include/types/hlua.h
@@ -3,6 +3,8 @@
 
 #include <lua.h>
 
+#define CLASS_CORE     "Core"
+
 enum hlua_state {
 	HLUA_STOP = 0,
 	HLUA_RUN,
diff --git a/include/types/log.h b/include/types/log.h
index c680663..345a09f 100644
--- a/include/types/log.h
+++ b/include/types/log.h
@@ -33,6 +33,8 @@
 #define SYSLOG_PORT             514
 #define UNIQUEID_LEN            128
 
+/* The array containing the names of the log levels. */
+extern const char *log_levels[];
 
 /* lists of fields that can be logged */
 enum {