diff --git a/include/proto/map.h b/include/proto/map.h
index 907c8ca..9690abb 100644
--- a/include/proto/map.h
+++ b/include/proto/map.h
@@ -32,4 +32,7 @@
 
 struct map_reference *map_get_reference(const char *reference);
 
+int sample_load_map(struct arg *arg, struct sample_conv *conv,
+                    const char *file, int line, char **err);
+
 #endif /* _PROTO_PATTERN_H */
diff --git a/include/types/hlua.h b/include/types/hlua.h
index 82e80c4..357f7ab 100644
--- a/include/types/hlua.h
+++ b/include/types/hlua.h
@@ -16,6 +16,7 @@
 #define CLASS_SOCKET   "Socket"
 #define CLASS_CHANNEL  "Channel"
 #define CLASS_HTTP     "HTTP"
+#define CLASS_MAP      "Map"
 
 struct stream;