diff --git a/include/Makefile.am b/include/Makefile.am
index b7c303a..996c41a 100644
--- a/include/Makefile.am
+++ b/include/Makefile.am
@@ -1,6 +1,7 @@
 nobase_include_HEADERS = \
 	ipmid/api.hpp \
 	ipmid/api-types.hpp \
+	ipmid/sessiondef.hpp \
 	ipmid/filter.hpp \
 	ipmid/handler.hpp \
 	ipmid/message.hpp \