diff --git a/include/asm-generic/pgtable-nopmd.h b/include/asm-generic/pgtable-nopmd.h
index 087325e..a7cdc48 100644
--- a/include/asm-generic/pgtable-nopmd.h
+++ b/include/asm-generic/pgtable-nopmd.h
@@ -5,6 +5,8 @@
 
 #include <asm-generic/pgtable-nopud.h>
 
+struct mm_struct;
+
 #define __PAGETABLE_PMD_FOLDED
 
 /*
@@ -54,7 +56,9 @@ static inline pmd_t * pmd_offset(pud_t * pud, unsigned long address)
  * inside the pud, so has no extra memory associated with it.
  */
 #define pmd_alloc_one(mm, address)		NULL
-#define pmd_free(mm, x)				do { } while (0)
+static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
+{
+}
 #define __pmd_free_tlb(tlb, x)			do { } while (0)
 
 #undef  pmd_addr_end