diff --git a/ubi/Makefile.am.include b/ubi/Makefile.am.include
index 7bcfcb2..1a5128a 100644
--- a/ubi/Makefile.am.include
+++ b/ubi/Makefile.am.include
@@ -1,2 +1,3 @@
 phosphor_image_updater_SOURCES += \
-	%reldir%/flash.cpp
+	%reldir%/flash.cpp \
+	%reldir%/item_updater_helper.cpp