diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index 057be95b1e1e5894bdbe3525d0f5f8f2b3860650..332aa33d02f4551786f0214e7551b6b9bea0d253 100644
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -2421,7 +2421,6 @@ setup_cluster_no_bitmap(struct btrfs_block_group_cache *block_group,
 	struct btrfs_free_space *entry = NULL;
 	struct btrfs_free_space *last;
 	struct rb_node *node;
-	u64 window_start;
 	u64 window_free;
 	u64 max_extent;
 	u64 total_size = 0;
@@ -2443,7 +2442,6 @@ setup_cluster_no_bitmap(struct btrfs_block_group_cache *block_group,
 		entry = rb_entry(node, struct btrfs_free_space, offset_index);
 	}
 
-	window_start = entry->offset;
 	window_free = entry->bytes;
 	max_extent = entry->bytes;
 	first = entry;