diff --git a/src/http/modules/ngx_http_range_filter_module.c b/src/http/modules/ngx_http_range_filter_module.c
index ac910fdfe..292a2b863 100644
--- a/src/http/modules/ngx_http_range_filter_module.c
+++ b/src/http/modules/ngx_http_range_filter_module.c
@@ -355,7 +355,7 @@ ngx_http_range_parse(ngx_http_request_t *r, ngx_http_range_filter_ctx_t *ctx,
         }
 
         if (suffix) {
-            start = content_length - end;
+            start = (end < content_length) ? content_length - end : 0;
             end = content_length - 1;
         }