includes: sort all includes
diff --git a/src/cpu/cpuevent.hh b/src/cpu/cpuevent.hh
index 65f0e87..77b1d91 100644
--- a/src/cpu/cpuevent.hh
+++ b/src/cpu/cpuevent.hh
@@ -32,6 +32,7 @@
 #define __CPU_CPUEVENT_HH__
 
 #include <vector>
+
 #include "sim/eventq.hh"
 
 class ThreadContext;