diff --git a/src/event/quic/ngx_event_quic_ssl.c b/src/event/quic/ngx_event_quic_ssl.c
index ba0b5929f..6ad3c0e93 100644
--- a/src/event/quic/ngx_event_quic_ssl.c
+++ b/src/event/quic/ngx_event_quic_ssl.c
@@ -57,7 +57,7 @@ ngx_quic_set_read_secret(ngx_ssl_conn_t *ssl_conn,
     ngx_connection_t       *c;
     ngx_quic_connection_t  *qc;
 
-    c = ngx_ssl_get_connection((ngx_ssl_conn_t *) ssl_conn);
+    c = ngx_ssl_get_connection(ssl_conn);
     qc = ngx_quic_get_connection(c);
 
     ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
@@ -87,7 +87,7 @@ ngx_quic_set_write_secret(ngx_ssl_conn_t *ssl_conn,
     ngx_connection_t       *c;
     ngx_quic_connection_t  *qc;
 
-    c = ngx_ssl_get_connection((ngx_ssl_conn_t *) ssl_conn);
+    c = ngx_ssl_get_connection(ssl_conn);
     qc = ngx_quic_get_connection(c);
 
     ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
@@ -119,7 +119,7 @@ ngx_quic_set_encryption_secrets(ngx_ssl_conn_t *ssl_conn,
     const SSL_CIPHER       *cipher;
     ngx_quic_connection_t  *qc;
 
-    c = ngx_ssl_get_connection((ngx_ssl_conn_t *) ssl_conn);
+    c = ngx_ssl_get_connection(ssl_conn);
     qc = ngx_quic_get_connection(c);
 
     ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
@@ -180,7 +180,7 @@ ngx_quic_add_handshake_data(ngx_ssl_conn_t *ssl_conn,
     const unsigned char    *alpn_data;
 #endif
 
-    c = ngx_ssl_get_connection((ngx_ssl_conn_t *) ssl_conn);
+    c = ngx_ssl_get_connection(ssl_conn);
     qc = ngx_quic_get_connection(c);
 
     ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0,
@@ -279,7 +279,7 @@ ngx_quic_flush_flight(ngx_ssl_conn_t *ssl_conn)
 #if (NGX_DEBUG)
     ngx_connection_t  *c;
 
-    c = ngx_ssl_get_connection((ngx_ssl_conn_t *) ssl_conn);
+    c = ngx_ssl_get_connection(ssl_conn);
 
     ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, 0,
                    "quic ngx_quic_flush_flight()");
@@ -295,7 +295,7 @@ ngx_quic_send_alert(ngx_ssl_conn_t *ssl_conn, enum ssl_encryption_level_t level,
     ngx_connection_t       *c;
     ngx_quic_connection_t  *qc;
 
-    c = ngx_ssl_get_connection((ngx_ssl_conn_t *) ssl_conn);
+    c = ngx_ssl_get_connection(ssl_conn);
 
     ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
                    "quic ngx_quic_send_alert() level:%s alert:%d",