diff --git a/fs/ioctl.c b/fs/ioctl.c
index 504e69578112..e0a3455f9a0f 100644
--- a/fs/ioctl.c
+++ b/fs/ioctl.c
@@ -173,7 +173,7 @@ int fiemap_prep(struct inode *inode, struct fiemap_extent_info *fieinfo,
 
 	if (*len == 0)
 		return -EINVAL;
-	if (start > maxbytes)
+	if (start >= maxbytes)
 		return -EFBIG;
 
 	/*