diff --git a/fuzzers/042-clk-bufg-config/top.py b/fuzzers/042-clk-bufg-config/top.py
index 3d56beab..8d770d6b 100644
--- a/fuzzers/042-clk-bufg-config/top.py
+++ b/fuzzers/042-clk-bufg-config/top.py
@@ -19,7 +19,7 @@ def gen_sites():
         ys = []
         for site, site_type in gridinfo.sites.items():
             if site_type == 'BUFGCTRL':
-                x, y = xy_fun()
+                x, y = xy_fun(site)
                 xs.append(x)
                 ys.append(y)