diff --git a/crypto/Makefile.am b/crypto/Makefile.am
index 6dc85fd..409e581 100644
--- a/crypto/Makefile.am
+++ b/crypto/Makefile.am
@@ -727,10 +727,13 @@ noinst_HEADERS += hidden/openssl/asn1t.h
 noinst_HEADERS += hidden/openssl/bio.h
 noinst_HEADERS += hidden/openssl/chacha.h
 noinst_HEADERS += hidden/openssl/hmac.h
+noinst_HEADERS += hidden/openssl/lhash.h
+noinst_HEADERS += hidden/openssl/pem.h
 noinst_HEADERS += hidden/openssl/pkcs12.h
 noinst_HEADERS += hidden/openssl/pkcs7.h
 noinst_HEADERS += hidden/openssl/poly1305.h
 noinst_HEADERS += hidden/openssl/rand.h
+noinst_HEADERS += hidden/openssl/rc2.h
 noinst_HEADERS += hidden/openssl/sm3.h
 noinst_HEADERS += hidden/openssl/sm4.h
 noinst_HEADERS += hidden/openssl/stack.h