diff --git a/model/ipv4-global-routing-unordered-nexthops.cc b/model/ipv4-global-routing-unordered-nexthops.cc
index 720be8d..0fdce0b 100644
--- a/model/ipv4-global-routing-unordered-nexthops.cc
+++ b/model/ipv4-global-routing-unordered-nexthops.cc
@@ -28,6 +28,10 @@
 
 #include <iomanip>
 
+#ifndef UINT32_MAX
+# define UINT32_MAX     (4294967295U)
+#endif
+
 NS_LOG_COMPONENT_DEFINE ("Ipv4GlobalRoutingUnorderedNexthops");
 
 namespace ns3 {