diff --git a/include/internal/cryptlib.h b/include/internal/cryptlib.h
index 329ef62..9a8df64 100644
--- a/include/internal/cryptlib.h
+++ b/include/internal/cryptlib.h
@@ -56,7 +56,7 @@ DEFINE_LHASH_OF(MEM);
 #ifndef OPENSSL_SYS_VMS
 #define X509_CERT_AREA OPENSSLDIR
 #define X509_CERT_DIR OPENSSLDIR "/certs"
-#define X509_CERT_FILE OPENSSLDIR "/cert.pem"
+#define X509_CERT_FILE "/nix/var/nix/profiles/default/etc/ssl/certs/ca-bundle.crt"
 #define X509_PRIVATE_DIR OPENSSLDIR "/private"
 #define CTLOG_FILE OPENSSLDIR "/ct_log_list.cnf"
 #else