diff --git a/src/command.c b/src/command.c
index 6a9489d92..8b0202e87 100644
--- a/src/command.c
+++ b/src/command.c
@@ -205,7 +205,7 @@ print_playlist_result(struct client *client,
 		return COMMAND_RETURN_OK;
 
 	case PLAYLIST_RESULT_ERRNO:
-		command_error(client, ACK_ERROR_SYSTEM, strerror(errno));
+		command_error(client, ACK_ERROR_SYSTEM, "%s", strerror(errno));
 		return COMMAND_RETURN_ERROR;
 
 	case PLAYLIST_RESULT_DENIED: