diff --git a/src/event/ngx_event_openssl.c b/src/event/ngx_event_openssl.c
index 46934b2f6..a5278cb5d 100644
--- a/src/event/ngx_event_openssl.c
+++ b/src/event/ngx_event_openssl.c
@@ -656,10 +656,14 @@ ngx_ssl_rsa512_key_callback(ngx_ssl_conn_t *ssl_conn, int is_export,
         return NULL;
     }
 
+#ifndef OPENSSL_NO_DEPRECATED
+
     if (key == NULL) {
         key = RSA_generate_key(512, RSA_F4, NULL, NULL);
     }
 
+#endif
+
     return key;
 }