diff --git a/arch/sh/mm/pgtable.c b/arch/sh/mm/pgtable.c
index cf7ce4b57359..3a4085ea0161 100644
--- a/arch/sh/mm/pgtable.c
+++ b/arch/sh/mm/pgtable.c
@@ -2,12 +2,14 @@
 #include <linux/mm.h>
 #include <linux/slab.h>
 
+#include <asm/pgalloc.h>
+
 static struct kmem_cache *pgd_cachep;
 #if PAGETABLE_LEVELS > 2
 static struct kmem_cache *pmd_cachep;
 #endif
 
-void pgd_ctor(void *x)
+static void pgd_ctor(void *x)
 {
 	pgd_t *pgd = x;