diff --git a/src/recorder.h b/src/recorder.h
index 12bc993..458fb1d 100644
--- a/src/recorder.h
+++ b/src/recorder.h
@@ -17,6 +17,7 @@
 };
 
 struct e1_recorder_line {
+	bool has_alarm;
 	struct {
 		bool enabled;
 		uint8_t line_nr;