diff --git a/src/include/Makefile.am b/src/include/Makefile.am
index 9edad11416..609e7c5b24 100644
--- a/src/include/Makefile.am
+++ b/src/include/Makefile.am
@@ -1,3 +1,3 @@
-EXTRA_DIST = linux/ipsec.h linux/netlink.h linux/rtnetlink.h \
+EXTRA_DIST = linux/if_alg.h linux/ipsec.h linux/netlink.h linux/rtnetlink.h \
              linux/pfkeyv2.h linux/udp.h linux/xfrm.h linux/types.h \
              linux/jhash.h sys/queue.h