--- src/mod_openssl.c
+++ src/mod_openssl.c
@@ -2276,7 +2276,7 @@
             SSL_CTX_set_options(s->ssl_ctx, SSL_OP_PRIORITIZE_CHACHA);
       #endif
 
-      #ifndef OPENSSL_NO_DH
+      #if !defined(OPENSSL_NO_DH) && !defined(OPENSSL_NO_BIO)
       {
        #if OPENSSL_VERSION_NUMBER < 0x30000000L
         DH *dh;