diff --git a/crypto/Makefile.am b/crypto/Makefile.am
index cf611a2..b4d558b 100644
--- a/crypto/Makefile.am
+++ b/crypto/Makefile.am
@@ -729,6 +729,7 @@ noinst_HEADERS += hidden/openssl/hmac.h
 noinst_HEADERS += hidden/openssl/pkcs12.h
 noinst_HEADERS += hidden/openssl/pkcs7.h
 noinst_HEADERS += hidden/openssl/stack.h
+noinst_HEADERS += hidden/openssl/ts.h
 noinst_HEADERS += hidden/openssl/ui.h
 noinst_HEADERS += hidden/openssl/x509.h
 noinst_HEADERS += hidden/openssl/x509_vfy.h