diff --git a/transporthandler.cpp b/transporthandler.cpp
index a533e8c..da4231a 100644
--- a/transporthandler.cpp
+++ b/transporthandler.cpp
@@ -390,7 +390,9 @@
     }
 
     if (struct in_addr nullIPv4{0};
-        (address == std::nullopt || address.value().s_addr != nullIPv4.s_addr))
+        (address == std::nullopt && prefix != std::nullopt) ||
+        (address != std::nullopt &&
+         (address.value().s_addr != nullIPv4.s_addr)))
     {
         createIfAddr<AF_INET>(bus, params, address.value_or(ifaddr->address),
                               prefix.value_or(fallbackPrefix));