diff --git a/fs/bcachefs/fs-io.c b/fs/bcachefs/fs-io.c
index fead9ab10e4a..77b85da30fb2 100644
--- a/fs/bcachefs/fs-io.c
+++ b/fs/bcachefs/fs-io.c
@@ -867,9 +867,6 @@ loff_t bch2_remap_file_range(struct file *file_src, loff_t pos_src,
 	if (remap_flags & ~(REMAP_FILE_DEDUP|REMAP_FILE_ADVISORY))
 		return -EINVAL;
 
-	if (remap_flags & REMAP_FILE_DEDUP)
-		return -EOPNOTSUPP;
-
 	if ((pos_src & (block_bytes(c) - 1)) ||
 	    (pos_dst & (block_bytes(c) - 1)))
 		return -EINVAL;
@@ -902,7 +899,8 @@ loff_t bch2_remap_file_range(struct file *file_src, loff_t pos_src,
 	if (ret)
 		goto err;
 
-	file_update_time(file_dst);
+	if (!(remap_flags & REMAP_FILE_DEDUP))
+		file_update_time(file_dst);
 
 	bch2_mark_pagecache_unallocated(src, pos_src >> 9,
 				   (pos_src + aligned_len) >> 9);