--- modules/proxy/ajp_header.c	(Revision 652878)
+++ modules/proxy/ajp_header.c	(Arbeitskopie)
@@ -432,6 +432,12 @@ 
     return APR_SUCCESS;
 }
 
+static int copy_header(void *v, const char *key, const char *val)
+{
+    apr_table_addn(v, key, val);
+    return 1;
+}
+
 /*
 AJPV13_RESPONSE/AJPV14_RESPONSE:=
     response_prefix (2)
@@ -493,7 +499,20 @@ 
 
     rc = ajp_msg_get_uint16(msg, &num_headers);
     if (rc == APR_SUCCESS) {
-        r->headers_out = apr_table_make(r->pool, num_headers);
+        apr_table_t *save;
+
+        /*
+         * Prior to reseting r->headers_out save possible Set-Cookie
+         * headers set by other modules like mod_usertrack.
+         */
+        if (apr_table_get(r->headers_out, "Set-Cookie")) {
+            save = apr_table_make(r->pool, num_headers + 2);
+            apr_table_do(copy_header, save, r->headers_out, "Set-Cookie", NULL);
+        }
+        else {
+            save = apr_table_make(r->pool, num_headers);
+        }
+        r->headers_out = save;
     } else {
         r->headers_out = NULL;
         num_headers = 0;