--- a/src/http/modules/ngx_http_geo_module.c
+++ b/src/http/modules/ngx_http_geo_module.c
@@ -400,15 +400,15 @@ ngx_http_geo_block(ngx_conf_t *cf, ngx_c
             }
         }
 
+        if (ctx.high.default_value == NULL) {
+            ctx.high.default_value = &ngx_http_variable_null_value;
+        }
+
         geo->u.high = ctx.high;
 
         var->get_handler = ngx_http_geo_range_variable;
         var->data = (uintptr_t) geo;
 
-        if (ctx.high.default_value == NULL) {
-            ctx.high.default_value = &ngx_http_variable_null_value;
-        }
-
         ngx_destroy_pool(ctx.temp_pool);
         ngx_destroy_pool(pool);