diff --git a/crypto/Makefile.am b/crypto/Makefile.am
index 97a78e0..f734617 100644
--- a/crypto/Makefile.am
+++ b/crypto/Makefile.am
@@ -725,7 +725,11 @@ noinst_HEADERS += hidden/crypto_namespace.h
 noinst_HEADERS += hidden/openssl/asn1.h
 noinst_HEADERS += hidden/openssl/asn1t.h
 noinst_HEADERS += hidden/openssl/bio.h
+noinst_HEADERS += hidden/openssl/buffer.h
 noinst_HEADERS += hidden/openssl/chacha.h
+noinst_HEADERS += hidden/openssl/cms.h
+noinst_HEADERS += hidden/openssl/comp.h
+noinst_HEADERS += hidden/openssl/conf_api.h
 noinst_HEADERS += hidden/openssl/ct.h
 noinst_HEADERS += hidden/openssl/dso.h
 noinst_HEADERS += hidden/openssl/ec.h