diff --git a/fs/btrfs/free-space-tree.c b/fs/btrfs/free-space-tree.c
index 9efd1ec90f03..472b3060e5ac 100644
--- a/fs/btrfs/free-space-tree.c
+++ b/fs/btrfs/free-space-tree.c
@@ -259,7 +259,11 @@ int btrfs_convert_free_space_to_bitmaps(struct btrfs_trans_handle *trans,
 				nr++;
 				path->slots[0]--;
 			} else {
-				ASSERT(0);
+				btrfs_err(fs_info, "unexpected free space tree key type %u",
+					  found_key.type);
+				ret = -EUCLEAN;
+				btrfs_abort_transaction(trans, ret);
+				goto out;
 			}
 		}
 
@@ -405,7 +409,11 @@ int btrfs_convert_free_space_to_extents(struct btrfs_trans_handle *trans,
 
 				nr++;
 			} else {
-				ASSERT(0);
+				btrfs_err(fs_info, "unexpected free space tree key type %u",
+					  found_key.type);
+				ret = -EUCLEAN;
+				btrfs_abort_transaction(trans, ret);
+				goto out;
 			}
 		}
 
@@ -1518,7 +1526,11 @@ int btrfs_remove_block_group_free_space(struct btrfs_trans_handle *trans,
 				nr++;
 				path->slots[0]--;
 			} else {
-				ASSERT(0);
+				btrfs_err(trans->fs_info, "unexpected free space tree key type %u",
+					  found_key.type);
+				ret = -EUCLEAN;
+				btrfs_abort_transaction(trans, ret);
+				return ret;
 			}
 		}