1 files changed, 1 insertions, 0 deletions
diff --git a/src/H5FDmirror.c b/src/H5FDmirror.c
index ef035c1..9f47806 100644
--- a/src/H5FDmirror.c
+++ b/src/H5FDmirror.c
@@ -197,6 +197,7 @@ static const H5FD_class_t H5FD_mirror_g = {
     H5FD_mirror_truncate,       /* truncate             */
     H5FD_mirror_lock,           /* lock                 */
     H5FD_mirror_unlock,         /* unlock               */
+    NULL,                       /* dedup                */
     H5FD_FLMAP_DICHOTOMY        /* fl_map               */
 };