diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index b74a6d23a0fe..a21a984d84d9 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -607,12 +607,11 @@ static noinline void compress_file_range(struct inode *inode,
 
 		/*
 		 * one last check to make sure the compression is really a
-		 * win, compare the page count read with the blocks on disk
+		 * win, compare the page count read with the blocks on disk,
+		 * compression must free at least one sector size
 		 */
 		total_in = ALIGN(total_in, PAGE_SIZE);
-		if (total_compressed >= total_in) {
-			will_compress = 0;
-		} else {
+		if (total_compressed + blocksize <= total_in) {
 			num_bytes = total_in;
 			*num_added += 1;