diff --git a/src/cpu/pc_event.hh b/src/cpu/pc_event.hh
index 6b048b2c2..3709dcd59 100644
--- a/src/cpu/pc_event.hh
+++ b/src/cpu/pc_event.hh
@@ -35,6 +35,7 @@
 #include <vector>
 
 #include "base/misc.hh"
+#include "sim/host.hh"
 
 class ThreadContext;
 class PCEventQueue;