https://github.com/sctp/lksctp-tools/commit/378560050a8f93786c590cc99a55461666205b61

--- a/src/include/netinet/Makefile.am
+++ b/src/include/netinet/Makefile.am
@@ -11,5 +11,4 @@ libcnetinetdir = $(includedir)/netinet
 # API.
 include_HEADERS =
 
-libcnetinet_HEADERS = sctp.h.in
-BUILT_SOURCES = sctp.h
+libcnetinet_HEADERS = sctp.h