diff --git a/src/http/ngx_http_parse.c b/src/http/ngx_http_parse.c
index 559a5cb..40e7700 100644
--- a/src/http/ngx_http_parse.c
+++ b/src/http/ngx_http_parse.c
@@ -335,18 +335,26 @@
                 break;
             }
 
+            r->host_end = p;
+
             switch (ch) {
             case ':':
-                r->host_end = p;
                 state = sw_port;
                 break;
             case '/':
-                r->host_end = p;
                 r->uri_start = p;
                 state = sw_after_slash_in_uri;
                 break;
+            case ' ':
+                /*
+                 * use single "/" from request line to preserve pointers,
+                 * if request line will be copied to large client buffer
+                 */
+                r->uri_start = r->schema_end + 1;
+                r->uri_end = r->schema_end + 2;
+                state = sw_http_09;
+                break;
             default:
-                r->host_end = p;
                 return NGX_HTTP_PARSE_INVALID_REQUEST;
             }
             break;
@@ -362,6 +370,16 @@
                 r->uri_start = p;
                 state = sw_after_slash_in_uri;
                 break;
+            case ' ':
+                r->port_end = p;
+                /*
+                 * use single "/" from request line to preserve pointers,
+                 * if request line will be copied to large client buffer
+                 */
+                r->uri_start = r->schema_end + 1;
+                r->uri_end = r->schema_end + 2;
+                state = sw_http_09;
+                break;
             default:
                 return NGX_HTTP_PARSE_INVALID_REQUEST;
             }