diff --git a/include/linux/mm.h b/include/linux/mm.h
index 17b27cd..6c65d24 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -893,7 +893,7 @@
 
 int zap_vma_ptes(struct vm_area_struct *vma, unsigned long address,
 		unsigned long size);
-unsigned long zap_page_range(struct vm_area_struct *vma, unsigned long address,
+void zap_page_range(struct vm_area_struct *vma, unsigned long address,
 		unsigned long size, struct zap_details *);
 unsigned long unmap_vmas(struct mmu_gather *tlb,
 		struct vm_area_struct *start_vma, unsigned long start_addr,