diff --git a/include/Makefile.am b/include/Makefile.am
index 2bd96ed..4999ee9 100644
--- a/include/Makefile.am
+++ b/include/Makefile.am
@@ -2,3 +2,4 @@ noinst_HEADERS =
 noinst_HEADERS += string.h
 noinst_HEADERS += sys/queue.h
 noinst_HEADERS += sys/tree.h
+noinst_HEADERS += sys/types.h