diff --git a/Makefile.am b/Makefile.am
index 2ded4bf..cbe848d 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -7,4 +7,5 @@
 libhwmon_la_SOURCES = \
 	argument.cpp \
 	directory.cpp \
-	sensorset.cpp
+	sensorset.cpp \
+	mainloop.cpp