diff --git a/Makefile.am b/Makefile.am
index e652205..0af1b6d 100755
--- a/Makefile.am
+++ b/Makefile.am
@@ -36,6 +36,7 @@
 phosphor_image_updater_SOURCES = \
 	activation.cpp \
 	version.cpp \
+	serialize.cpp \
 	item_updater.cpp \
 	item_updater_main.cpp