diff --git a/src/iface.cc b/src/iface.cc
index d05b846..73b8482 100644
--- a/src/iface.cc
+++ b/src/iface.cc
@@ -162,13 +162,13 @@ ptr<iface> iface::open_pfd(const std::string& name)
         return ptr<iface>();
     }
 
-    // Eh. Allmulti.
-    ifa->_prev_allmulti = ifa->allmulti(1);
-
     // Set up an instance of 'iface'.
 
     ifa->_pfd = fd;
 
+    // Eh. Allmulti.
+    ifa->_prev_allmulti = ifa->allmulti(1);
+
     _map_dirty = true;
 
     return ifa;