diff --git a/sys/arm/include/smp.h b/sys/arm/include/smp.h
index a55a70b04c7..883c5b90352 100644
--- a/sys/arm/include/smp.h
+++ b/sys/arm/include/smp.h
@@ -4,6 +4,7 @@
 #define _MACHINE_SMP_H_
 
 #include <sys/_cpuset.h>
+#include <machine/pcb.h>
 
 #define IPI_AST		0
 #define IPI_PREEMPT	2