diff --git a/qemu/include/qemu/timer.h b/qemu/include/qemu/timer.h
index f4e9af81..fe37c03a 100644
--- a/qemu/include/qemu/timer.h
+++ b/qemu/include/qemu/timer.h
@@ -4,6 +4,7 @@
 #include "qemu/typedefs.h"
 #include "qemu-common.h"
 #include "qemu/host-utils.h"
+#include "sysemu/cpus.h"
 
 #define NANOSECONDS_PER_SECOND 1000000000LL