diff --git a/softmmu/runstate.c b/softmmu/runstate.c
index 0187f18..ce8977c 100644
--- a/softmmu/runstate.c
+++ b/softmmu/runstate.c
@@ -317,7 +317,7 @@
     g_free(e);
 }
 
-void vm_state_notify(int running, RunState state)
+void vm_state_notify(bool running, RunState state)
 {
     VMChangeStateEntry *e, *next;