diff --git a/sensor-monitor/Makefile.am b/sensor-monitor/Makefile.am
index da19997..313c59f 100644
--- a/sensor-monitor/Makefile.am
+++ b/sensor-monitor/Makefile.am
@@ -9,6 +9,7 @@
 
 sensor_monitor_SOURCES = \
     shutdown_alarm_monitor.cpp \
+    threshold_alarm_logger.cpp \
 	main.cpp
 
 sensor_monitor_LDADD = \