diff --git a/include/asm-m32r/pgtable.h b/include/asm-m32r/pgtable.h
index 1cd5fd4..75740de 100644
--- a/include/asm-m32r/pgtable.h
+++ b/include/asm-m32r/pgtable.h
@@ -27,6 +27,9 @@
 #include <asm/bitops.h>
 #include <asm/page.h>
 
+struct mm_struct;
+struct vm_area_struct;
+
 extern pgd_t swapper_pg_dir[1024];
 extern void paging_init(void);