diff --git a/fs/btrfs/block-group.h b/fs/btrfs/block-group.h
index 5c6e2fb23e3527..c391800388ddaa 100644
--- a/fs/btrfs/block-group.h
+++ b/fs/btrfs/block-group.h
@@ -3,6 +3,8 @@
 #ifndef BTRFS_BLOCK_GROUP_H
 #define BTRFS_BLOCK_GROUP_H
 
+#include "free-space-cache.h"
+
 enum btrfs_disk_cache_state {
 	BTRFS_DC_WRITTEN,
 	BTRFS_DC_ERROR,
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 17cd88521ad2c3..0b6eca746fd492 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -434,20 +434,6 @@ enum btrfs_caching_type {
 	BTRFS_CACHE_ERROR,
 };
 
-struct btrfs_io_ctl {
-	void *cur, *orig;
-	struct page *page;
-	struct page **pages;
-	struct btrfs_fs_info *fs_info;
-	struct inode *inode;
-	unsigned long size;
-	int index;
-	int num_pages;
-	int entries;
-	int bitmaps;
-	unsigned check_crcs:1;
-};
-
 /*
  * Tree to record all locked full stripes of a RAID5/6 block group
  */
diff --git a/fs/btrfs/free-space-cache.h b/fs/btrfs/free-space-cache.h
index 2205a4113ef3fb..39c32c8fc24f80 100644
--- a/fs/btrfs/free-space-cache.h
+++ b/fs/btrfs/free-space-cache.h
@@ -36,7 +36,19 @@ struct btrfs_free_space_op {
 			   struct btrfs_free_space *info);
 };
 
-struct btrfs_io_ctl;
+struct btrfs_io_ctl {
+	void *cur, *orig;
+	struct page *page;
+	struct page **pages;
+	struct btrfs_fs_info *fs_info;
+	struct inode *inode;
+	unsigned long size;
+	int index;
+	int num_pages;
+	int entries;
+	int bitmaps;
+	unsigned check_crcs:1;
+};
 
 struct inode *lookup_free_space_inode(
 		struct btrfs_block_group_cache *block_group,