diff --git a/main/channel.c b/main/channel.c
index 6c014449173db99815770ddb056c9106da43caee..f094333877cce17e2c7674b3152fa5448a4dbcf7 100644
--- a/main/channel.c
+++ b/main/channel.c
@@ -131,7 +131,7 @@ static AST_RWLIST_HEAD_STATIC(channels, ast_channel);
  *
  * \ref causes.h
 */
-const struct ast_cause {
+static const struct {
 	int cause;
 	const char *name;
 	const char *desc;