diff --git a/src/brand/bhyve/bootlib.py b/src/brand/bhyve/bootlib.py
index cc535ad36..c3ce019be 100644
--- a/src/brand/bhyve/bootlib.py
+++ b/src/brand/bhyve/bootlib.py
@@ -228,7 +228,12 @@ def build_cloudinit_image(self, uuid, src, testmode):
                     "addresses": [addr],
                 }
                 if rtr:
-                    data["gateway4"] = rtr
+                    data["routes"] = [
+                        {
+                            "to": "0.0.0.0/0",
+                            "via": rtr,
+                        }
+                    ]
 
                 if not nsdone:
                     domain = self.findattr("dns-domain")