--- httpd/modules/http/byterange_filter.c
+++ httpd/modules/http/byterange_filter.c
@@ -501,7 +501,7 @@
             break;
         }
 
-        if (dash == range) {
+        if (dash == cur) {
             /* In the form "-5" */
             if (apr_strtoff(&number, dash+1, &errp, 10) || *errp) {
                 break;