diff --git a/monitor/Makefile.am b/monitor/Makefile.am
index 2c7a7fa..78b0b57 100644
--- a/monitor/Makefile.am
+++ b/monitor/Makefile.am
@@ -7,6 +7,7 @@
 phosphor_fan_monitor_SOURCES = \
 	argument.cpp \
 	fan.cpp \
+	fan_error.cpp \
 	power_interface.cpp \
 	logging.cpp \
 	main.cpp \