diff --git a/sys/amd64/include/smp.h b/sys/amd64/include/smp.h
index 0524d76b6fbe..02f2bb85b62e 100644
--- a/sys/amd64/include/smp.h
+++ b/sys/amd64/include/smp.h
@@ -177,6 +177,7 @@ void	u_sleep			__P((int));
 /* global data in init_smp.c */
 extern int			invltlb_ok;
 extern int			smp_active;
+extern int			smp_started;
 extern volatile int		smp_idle_loops;
 
 #endif /* !LOCORE */
diff --git a/sys/i386/include/smp.h b/sys/i386/include/smp.h
index 0524d76b6fbe..02f2bb85b62e 100644
--- a/sys/i386/include/smp.h
+++ b/sys/i386/include/smp.h
@@ -177,6 +177,7 @@ void	u_sleep			__P((int));
 /* global data in init_smp.c */
 extern int			invltlb_ok;
 extern int			smp_active;
+extern int			smp_started;
 extern volatile int		smp_idle_loops;
 
 #endif /* !LOCORE */
diff --git a/sys/sys/smp.h b/sys/sys/smp.h
index 0524d76b6fbe..02f2bb85b62e 100644
--- a/sys/sys/smp.h
+++ b/sys/sys/smp.h
@@ -177,6 +177,7 @@ void	u_sleep			__P((int));
 /* global data in init_smp.c */
 extern int			invltlb_ok;
 extern int			smp_active;
+extern int			smp_started;
 extern volatile int		smp_idle_loops;
 
 #endif /* !LOCORE */