diff --git a/fs/ramfs/file-mmu.c b/fs/ramfs/file-mmu.c
index 0947fb5..54ebbc8 100644
--- a/fs/ramfs/file-mmu.c
+++ b/fs/ramfs/file-mmu.c
@@ -25,11 +25,13 @@
  */
 
 #include <linux/fs.h>
+#include <linux/mm.h>
 
 const struct address_space_operations ramfs_aops = {
 	.readpage	= simple_readpage,
 	.prepare_write	= simple_prepare_write,
-	.commit_write	= simple_commit_write
+	.commit_write	= simple_commit_write,
+	.set_page_dirty = __set_page_dirty_nobuffers,
 };
 
 const struct file_operations ramfs_file_operations = {
diff --git a/fs/ramfs/file-nommu.c b/fs/ramfs/file-nommu.c
index 61cbe1e..e9d6c47 100644
--- a/fs/ramfs/file-nommu.c
+++ b/fs/ramfs/file-nommu.c
@@ -11,6 +11,7 @@
 
 #include <linux/module.h>
 #include <linux/fs.h>
+#include <linux/mm.h>
 #include <linux/pagemap.h>
 #include <linux/highmem.h>
 #include <linux/init.h>
@@ -30,7 +31,8 @@
 const struct address_space_operations ramfs_aops = {
 	.readpage		= simple_readpage,
 	.prepare_write		= simple_prepare_write,
-	.commit_write		= simple_commit_write
+	.commit_write		= simple_commit_write,
+	.set_page_dirty = __set_page_dirty_nobuffers,
 };
 
 const struct file_operations ramfs_file_operations = {