diff --git a/ubi/Makefile.am.include b/ubi/Makefile.am.include
index c75293d..decf1e9 100644
--- a/ubi/Makefile.am.include
+++ b/ubi/Makefile.am.include
@@ -1,4 +1,5 @@
 openpower_update_manager_SOURCES += \
 	%reldir%/activation_ubi.cpp \
 	%reldir%/item_updater_ubi.cpp \
+	%reldir%/serialize.cpp \
 	%reldir%/watch.cpp