diff --git a/src/http/modules/ngx_http_geo_module.c b/src/http/modules/ngx_http_geo_module.c
index 310317a..2ada4c8 100644
--- a/src/http/modules/ngx_http_geo_module.c
+++ b/src/http/modules/ngx_http_geo_module.c
@@ -521,7 +521,12 @@
     for (n = start; n < end; n += 0x10000) {
 
         h = n >> 16;
-        s = n & 0xffff;
+
+        if (n == start) {
+            s = n & 0xffff;
+        } else {
+            s = 0;
+        }
 
         if ((n | 0xffff) > end) {
             e = end & 0xffff;