diff --git a/crypto/Makefile.am b/crypto/Makefile.am
index 7e91a64..bd1a61a 100644
--- a/crypto/Makefile.am
+++ b/crypto/Makefile.am
@@ -735,6 +735,7 @@ noinst_HEADERS += hidden/openssl/comp.h
 noinst_HEADERS += hidden/openssl/conf_api.h
 noinst_HEADERS += hidden/openssl/crypto.h
 noinst_HEADERS += hidden/openssl/ct.h
+noinst_HEADERS += hidden/openssl/curve25519.h
 noinst_HEADERS += hidden/openssl/dsa.h
 noinst_HEADERS += hidden/openssl/dso.h
 noinst_HEADERS += hidden/openssl/ec.h