diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index a2c5d4ad4535ad3af9323d73b5e080bbb8e8dc2c..ba73eda0600e1e58cb796b0021f6dd535c6f577e 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -646,6 +646,7 @@ static int nfs_vmtruncate(struct inode * inode, loff_t offset)
 	/* Optimisation */
 	if (offset == 0)
 		NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_DATA;
+	NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_SIZE;
 
 	spin_unlock(&inode->i_lock);
 	truncate_pagecache(inode, offset);
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index 3efce54ef1cde04404e14a4eaa618644ca3b363d..541471a32784d36183cbea882935af0c50debe33 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -231,6 +231,7 @@ static void nfs_grow_file(struct page *page, unsigned int offset, unsigned int c
 	if (i_size >= end)
 		goto out;
 	i_size_write(inode, end);
+	NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_SIZE;
 	nfs_inc_stats(inode, NFSIOS_EXTENDWRITE);
 out:
 	spin_unlock(&inode->i_lock);