diff --git a/src/http/modules/ngx_http_charset_filter_module.c b/src/http/modules/ngx_http_charset_filter_module.c
index 0bc31bc..e3fdb65 100644
--- a/src/http/modules/ngx_http_charset_filter_module.c
+++ b/src/http/modules/ngx_http_charset_filter_module.c
@@ -432,6 +432,17 @@
             b = cl->buf;
 
             if (ngx_buf_size(b) == 0) {
+
+                *ll = ngx_alloc_chain_link(r->pool);
+                if (*ll == NULL) {
+                    return NGX_ERROR;
+                }
+
+                (*ll)->buf = b;
+                (*ll)->next = NULL;
+
+                ll = &(*ll)->next;
+
                 continue;
             }
 
diff --git a/src/http/modules/ngx_http_fastcgi_module.c b/src/http/modules/ngx_http_fastcgi_module.c
index 172a1a7..28f860e 100644
--- a/src/http/modules/ngx_http_fastcgi_module.c
+++ b/src/http/modules/ngx_http_fastcgi_module.c
@@ -168,6 +168,7 @@
     { ngx_string("http_500"), NGX_HTTP_UPSTREAM_FT_HTTP_500 },
     { ngx_string("http_503"), NGX_HTTP_UPSTREAM_FT_HTTP_503 },
     { ngx_string("http_404"), NGX_HTTP_UPSTREAM_FT_HTTP_404 },
+    { ngx_string("off"), NGX_HTTP_UPSTREAM_FT_OFF },
     { ngx_null_string, 0 }
 };
 
@@ -1694,6 +1695,11 @@
                                |NGX_HTTP_UPSTREAM_FT_ERROR
                                |NGX_HTTP_UPSTREAM_FT_TIMEOUT));
 
+    if (conf->upstream.next_upstream & NGX_HTTP_UPSTREAM_FT_OFF) {
+        conf->upstream.next_upstream = NGX_CONF_BITMASK_SET
+                                       |NGX_HTTP_UPSTREAM_FT_OFF;
+    }
+
     ngx_conf_merge_uint_value(conf->upstream.max_fails,
                               prev->upstream.max_fails, 1);
 
diff --git a/src/http/modules/ngx_http_memcached_module.c b/src/http/modules/ngx_http_memcached_module.c
index 000622d..4373692 100644
--- a/src/http/modules/ngx_http_memcached_module.c
+++ b/src/http/modules/ngx_http_memcached_module.c
@@ -45,6 +45,7 @@
     { ngx_string("timeout"), NGX_HTTP_UPSTREAM_FT_TIMEOUT },
     { ngx_string("invalid_response"), NGX_HTTP_UPSTREAM_FT_INVALID_HEADER },
     { ngx_string("not_found"), NGX_HTTP_UPSTREAM_FT_HTTP_404 },
+    { ngx_string("off"), NGX_HTTP_UPSTREAM_FT_OFF },
     { ngx_null_string, 0 }
 };
 
@@ -560,6 +561,11 @@
                                |NGX_HTTP_UPSTREAM_FT_ERROR
                                |NGX_HTTP_UPSTREAM_FT_TIMEOUT));
 
+    if (conf->upstream.next_upstream & NGX_HTTP_UPSTREAM_FT_OFF) {
+        conf->upstream.next_upstream = NGX_CONF_BITMASK_SET
+                                       |NGX_HTTP_UPSTREAM_FT_OFF;
+    }
+
     ngx_conf_merge_uint_value(conf->upstream.max_fails,
                               prev->upstream.max_fails, 1);
 
diff --git a/src/http/modules/ngx_http_proxy_module.c b/src/http/modules/ngx_http_proxy_module.c
index ff5b129..5999f2e 100644
--- a/src/http/modules/ngx_http_proxy_module.c
+++ b/src/http/modules/ngx_http_proxy_module.c
@@ -127,6 +127,7 @@
     { ngx_string("http_500"), NGX_HTTP_UPSTREAM_FT_HTTP_500 },
     { ngx_string("http_503"), NGX_HTTP_UPSTREAM_FT_HTTP_503 },
     { ngx_string("http_404"), NGX_HTTP_UPSTREAM_FT_HTTP_404 },
+    { ngx_string("off"), NGX_HTTP_UPSTREAM_FT_OFF },
     { ngx_null_string, 0 }
 };
 
@@ -1648,6 +1649,11 @@
                                |NGX_HTTP_UPSTREAM_FT_ERROR
                                |NGX_HTTP_UPSTREAM_FT_TIMEOUT));
 
+    if (conf->upstream.next_upstream & NGX_HTTP_UPSTREAM_FT_OFF) {
+        conf->upstream.next_upstream = NGX_CONF_BITMASK_SET
+                                       |NGX_HTTP_UPSTREAM_FT_OFF;
+    }
+
     ngx_conf_merge_uint_value(conf->upstream.max_fails,
                               prev->upstream.max_fails, 1);