diff --git a/Makefile.am b/Makefile.am
index ef4d98b..72698b7 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -9,6 +9,8 @@
 	$(PHOSPHOR_LOGGING_CFLAGS) \
 	$(SDBUSPLUS_CFLAGS)
 
-libpower_la_SOURCES = timer.cpp
+libpower_la_SOURCES = \
+	timer.cpp \
+	utility.cpp
 
 SUBDIRS = .