diff --git a/extensions/openpower-pels/openpower-pels.mk b/extensions/openpower-pels/openpower-pels.mk
index cca1228..c74f205 100644
--- a/extensions/openpower-pels/openpower-pels.mk
+++ b/extensions/openpower-pels/openpower-pels.mk
@@ -15,4 +15,5 @@
 	extensions/openpower-pels/repository.cpp \
 	extensions/openpower-pels/section_factory.cpp \
 	extensions/openpower-pels/severity.cpp \
+	extensions/openpower-pels/user_data.cpp \
 	extensions/openpower-pels/user_header.cpp