diff --git a/include/asm-sh/processor.h b/include/asm-sh/processor.h
index 4f2922a1979c..9f3ee775fe13 100644
--- a/include/asm-sh/processor.h
+++ b/include/asm-sh/processor.h
@@ -10,6 +10,7 @@
 #ifdef __KERNEL__
 
 #include <linux/compiler.h>
+#include <linux/smp.h>
 #include <asm/page.h>
 #include <asm/types.h>
 #include <asm/cache.h>