diff --git a/src/core/ngx_connection.h b/src/core/ngx_connection.h
index a49c5a6..1d3e3a3 100644
--- a/src/core/ngx_connection.h
+++ b/src/core/ngx_connection.h
@@ -147,7 +147,7 @@
     ngx_str_t           proxy_protocol_addr;
     in_port_t           proxy_protocol_port;
 
-#if (NGX_SSL)
+#if (NGX_SSL || NGX_COMPAT)
     ngx_ssl_connection_t  *ssl;
 #endif
 
diff --git a/src/core/ngx_core.h b/src/core/ngx_core.h
index 8f8489f..2069373 100644
--- a/src/core/ngx_core.h
+++ b/src/core/ngx_core.h
@@ -12,19 +12,21 @@
 #include <ngx_config.h>
 
 
-typedef struct ngx_module_s       ngx_module_t;
-typedef struct ngx_conf_s         ngx_conf_t;
-typedef struct ngx_cycle_s        ngx_cycle_t;
-typedef struct ngx_pool_s         ngx_pool_t;
-typedef struct ngx_chain_s        ngx_chain_t;
-typedef struct ngx_log_s          ngx_log_t;
-typedef struct ngx_open_file_s    ngx_open_file_t;
-typedef struct ngx_command_s      ngx_command_t;
-typedef struct ngx_file_s         ngx_file_t;
-typedef struct ngx_event_s        ngx_event_t;
-typedef struct ngx_event_aio_s    ngx_event_aio_t;
-typedef struct ngx_connection_s   ngx_connection_t;
-typedef struct ngx_thread_task_s  ngx_thread_task_t;
+typedef struct ngx_module_s          ngx_module_t;
+typedef struct ngx_conf_s            ngx_conf_t;
+typedef struct ngx_cycle_s           ngx_cycle_t;
+typedef struct ngx_pool_s            ngx_pool_t;
+typedef struct ngx_chain_s           ngx_chain_t;
+typedef struct ngx_log_s             ngx_log_t;
+typedef struct ngx_open_file_s       ngx_open_file_t;
+typedef struct ngx_command_s         ngx_command_t;
+typedef struct ngx_file_s            ngx_file_t;
+typedef struct ngx_event_s           ngx_event_t;
+typedef struct ngx_event_aio_s       ngx_event_aio_t;
+typedef struct ngx_connection_s      ngx_connection_t;
+typedef struct ngx_thread_task_s     ngx_thread_task_t;
+typedef struct ngx_ssl_s             ngx_ssl_t;
+typedef struct ngx_ssl_connection_s  ngx_ssl_connection_t;
 
 typedef void (*ngx_event_handler_pt)(ngx_event_t *ev);
 typedef void (*ngx_connection_handler_pt)(ngx_connection_t *c);
diff --git a/src/core/ngx_module.h b/src/core/ngx_module.h
index 4d0db44..8cf3210 100644
--- a/src/core/ngx_module.h
+++ b/src/core/ngx_module.h
@@ -139,7 +139,7 @@
 #define NGX_MODULE_SIGNATURE_23  "0"
 #endif
 
-#if (NGX_HTTP_SSL)
+#if (NGX_HTTP_SSL || NGX_COMPAT)
 #define NGX_MODULE_SIGNATURE_24  "1"
 #else
 #define NGX_MODULE_SIGNATURE_24  "0"
diff --git a/src/event/ngx_event_connect.h b/src/event/ngx_event_connect.h
index 6b97a24..72d21d7 100644
--- a/src/event/ngx_event_connect.h
+++ b/src/event/ngx_event_connect.h
@@ -27,13 +27,10 @@
     ngx_uint_t state);
 typedef void (*ngx_event_notify_peer_pt)(ngx_peer_connection_t *pc,
     void *data, ngx_uint_t type);
-#if (NGX_SSL)
-
 typedef ngx_int_t (*ngx_event_set_peer_session_pt)(ngx_peer_connection_t *pc,
     void *data);
 typedef void (*ngx_event_save_peer_session_pt)(ngx_peer_connection_t *pc,
     void *data);
-#endif
 
 
 struct ngx_peer_connection_s {
@@ -51,7 +48,7 @@
     ngx_event_notify_peer_pt         notify;
     void                            *data;
 
-#if (NGX_SSL)
+#if (NGX_SSL || NGX_COMPAT)
     ngx_event_set_peer_session_pt    set_session;
     ngx_event_save_peer_session_pt   save_session;
 #endif
diff --git a/src/event/ngx_event_openssl.h b/src/event/ngx_event_openssl.h
index 3367d10..24b812f 100644
--- a/src/event/ngx_event_openssl.h
+++ b/src/event/ngx_event_openssl.h
@@ -54,14 +54,14 @@
 #define ngx_ssl_conn_t          SSL
 
 
-typedef struct {
+struct ngx_ssl_s {
     SSL_CTX                    *ctx;
     ngx_log_t                  *log;
     size_t                      buffer_size;
-} ngx_ssl_t;
+};
 
 
-typedef struct {
+struct ngx_ssl_connection_s {
     ngx_ssl_conn_t             *connection;
     SSL_CTX                    *session_ctx;
 
@@ -80,7 +80,7 @@
     unsigned                    no_wait_shutdown:1;
     unsigned                    no_send_shutdown:1;
     unsigned                    handshake_buffer_set:1;
-} ngx_ssl_connection_t;
+};
 
 
 #define NGX_SSL_NO_SCACHE            -2
diff --git a/src/http/ngx_http_core_module.h b/src/http/ngx_http_core_module.h
index 7140a6b..ade9abb 100644
--- a/src/http/ngx_http_core_module.h
+++ b/src/http/ngx_http_core_module.h
@@ -67,9 +67,7 @@
     unsigned                   default_server:1;
     unsigned                   bind:1;
     unsigned                   wildcard:1;
-#if (NGX_HTTP_SSL)
     unsigned                   ssl:1;
-#endif
     unsigned                   http2:1;
 #if (NGX_HAVE_INET6)
     unsigned                   ipv6only:1;
@@ -230,9 +228,7 @@
 
     ngx_http_virtual_names_t  *virtual_names;
 
-#if (NGX_HTTP_SSL)
     unsigned                   ssl:1;
-#endif
     unsigned                   http2:1;
     unsigned                   proxy_protocol:1;
 };
diff --git a/src/http/ngx_http_request.h b/src/http/ngx_http_request.h
index ee609ad..cf9ee3c 100644
--- a/src/http/ngx_http_request.h
+++ b/src/http/ngx_http_request.h
@@ -300,7 +300,7 @@
     ngx_http_addr_conf_t             *addr_conf;
     ngx_http_conf_ctx_t              *conf_ctx;
 
-#if (NGX_HTTP_SSL)
+#if (NGX_HTTP_SSL || NGX_COMPAT)
     ngx_str_t                        *ssl_servername;
 #if (NGX_PCRE)
     ngx_http_regex_t                 *ssl_servername_regex;
@@ -313,9 +313,7 @@
     ngx_buf_t                       **free;
     ngx_int_t                         nfree;
 
-#if (NGX_HTTP_SSL)
     unsigned                          ssl:1;
-#endif
     unsigned                          proxy_protocol:1;
 } ngx_http_connection_t;
 
diff --git a/src/http/ngx_http_upstream.h b/src/http/ngx_http_upstream.h
index e6bf3c9..3d521f2 100644
--- a/src/http/ngx_http_upstream.h
+++ b/src/http/ngx_http_upstream.h
@@ -222,7 +222,7 @@
     unsigned                         intercept_404:1;
     unsigned                         change_buffering:1;
 
-#if (NGX_HTTP_SSL)
+#if (NGX_HTTP_SSL || NGX_COMPAT)
     ngx_ssl_t                       *ssl;
     ngx_flag_t                       ssl_session_reuse;
 
@@ -367,7 +367,7 @@
     ngx_str_t                        schema;
     ngx_str_t                        uri;
 
-#if (NGX_HTTP_SSL)
+#if (NGX_HTTP_SSL || NGX_COMPAT)
     ngx_str_t                        ssl_name;
 #endif
 
diff --git a/src/http/ngx_http_upstream_round_robin.h b/src/http/ngx_http_upstream_round_robin.h
index 92aa1a6..45f258d 100644
--- a/src/http/ngx_http_upstream_round_robin.h
+++ b/src/http/ngx_http_upstream_round_robin.h
@@ -40,7 +40,7 @@
 
     ngx_uint_t                      down;
 
-#if (NGX_HTTP_SSL)
+#if (NGX_HTTP_SSL || NGX_COMPAT)
     void                           *ssl_session;
     int                             ssl_session_len;
 #endif