diff --git a/src/protocol/bittorrent/common.c b/src/protocol/bittorrent/common.c
index a941952e8..49b445d2b 100644
--- a/src/protocol/bittorrent/common.c
+++ b/src/protocol/bittorrent/common.c
@@ -56,12 +56,12 @@ get_peer_id(bittorrent_id_T peer_id)
 	return hex;
 }
 
-char *
+const char *
 get_peer_message(bittorrent_message_id_T message_id)
 {
 	static struct {
 		bittorrent_message_id_T message_id;
-		char *name;
+		const char *name;
 	} messages[] = {
 		{ BITTORRENT_MESSAGE_INCOMPLETE,	"incomplete"	 },
 		{ BITTORRENT_MESSAGE_KEEP_ALIVE,	"keep-alive"	 },
diff --git a/src/protocol/bittorrent/common.h b/src/protocol/bittorrent/common.h
index 73d356337..a605cc0b2 100644
--- a/src/protocol/bittorrent/common.h
+++ b/src/protocol/bittorrent/common.h
@@ -399,7 +399,7 @@ void done_bittorrent_message(struct bittorrent_message *message);
 /* ************************************************************************** */
 
 char *get_peer_id(bittorrent_id_T peer);
-char *get_peer_message(bittorrent_message_id_T message_id);
+const char *get_peer_message(bittorrent_message_id_T message_id);
 
 /* ************************************************************************** */
 /* Peer request management: */