diff --git a/libosmocore/configure.in b/libosmocore/configure.in
index d9fa6e8..b5898bd 100644
--- a/libosmocore/configure.in
+++ b/libosmocore/configure.in
@@ -32,6 +32,7 @@
 AC_OUTPUT(
 	libosmocore.pc
 	include/osmocore/Makefile
+	include/osmocore/protocol/Makefile
 	include/Makefile
 	src/Makefile
 	tests/Makefile