diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h
index 76bff2b..236b105 100644
--- a/include/asm-generic/pgtable.h
+++ b/include/asm-generic/pgtable.h
@@ -5,6 +5,7 @@
 #ifdef CONFIG_MMU
 
 #include <linux/mm_types.h>
+#include <linux/bug.h>
 
 #ifndef __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
 extern int ptep_set_access_flags(struct vm_area_struct *vma,