diff --git a/src/h5core/Makefile.am b/src/h5core/Makefile.am
index 8ef5c6b..c7e6137 100644
--- a/src/h5core/Makefile.am
+++ b/src/h5core/Makefile.am
@@ -37,6 +37,7 @@ EXTRA_HEADERS =					\
 	h5t_consts_private.h			\
 	h5t_errorhandling_private.h		\
 	h5t_hsearch_private.h			\
+	h5t_openclose_private.h			\
 	h5t_readwrite_private.h			\
 	h5t_retrieve_private.h			\
 	h5t_storemesh_private.h			\