diff --git a/include/types/map.h b/include/types/map.h
index 15a0ef8b1..68f1a3638 100644
--- a/include/types/map.h
+++ b/include/types/map.h
@@ -29,7 +29,7 @@
  *
  * "maps" is the list head. This list cotains all the mao file name identifier.
  */
-struct list maps = LIST_HEAD_INIT(maps); /* list of struct map_reference */
+extern struct list maps;
 
 struct map_reference {
 	struct list list;    /* used for listing */
diff --git a/src/map.c b/src/map.c
index 4b1aeb567..81c61eb95 100644
--- a/src/map.c
+++ b/src/map.c
@@ -22,6 +22,8 @@
 #include <proto/pattern.h>
 #include <proto/sample.h>
 
+struct list maps = LIST_HEAD_INIT(maps); /* list of struct map_reference */
+
 /* This function return existing map reference or return NULL. */
 static struct map_reference *map_get_reference(const char *reference)
 {