diff --git a/src/Makefile.am b/src/Makefile.am
index 0dfe63b..3b4d9cf 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -8,7 +8,8 @@
 phosphor_dbus_monitor_SOURCES = \
 	functor.cpp \
 	main.cpp \
-	monitor.cpp
+	monitor.cpp \
+	propertywatch.cpp
 phosphor_dbus_monitor_LDADD = \
 	$(SDBUSPLUS_LIBS) \
 	$(PHOSPHOR_LOGGING_LIBS)