Index: modules/proxy/mod_proxy_wstunnel.c
===================================================================
--- a/modules/proxy/mod_proxy_wstunnel.c	(revision 1593857)
+++ b/modules/proxy/mod_proxy_wstunnel.c	(revision 1594625)
@@ -477,9 +477,11 @@
     conn_rec *c = r->connection;
     apr_pool_t *p = r->pool;
     apr_uri_t *uri;
+    int is_ssl = 0;
 
     if (strncasecmp(url, "wss:", 4) == 0) {
         scheme = "WSS";
+        is_ssl = 1;
     }
     else if (strncasecmp(url, "ws:", 3) == 0) {
         scheme = "WS";
@@ -503,7 +505,7 @@
         return status;
     }
 
-    backend->is_ssl = 0;
+    backend->is_ssl = is_ssl;
     backend->close = 0;
 
     retry = 0;