diff --git a/src/arch/alpha/arguments.hh b/src/arch/alpha/arguments.hh
index c44181a8d2..4dba4901fb 100644
--- a/src/arch/alpha/arguments.hh
+++ b/src/arch/alpha/arguments.hh
@@ -35,6 +35,7 @@
 
 #include "arch/alpha/vtophys.hh"
 #include "base/refcnt.hh"
+#include "mem/vport.hh"
 #include "sim/host.hh"
 
 class ThreadContext;