1 files changed, 1 insertions, 3 deletions
diff --git a/src/cache/backings/file_mapped.c b/src/cache/backings/file_mapped.c
index 7657a21..24ac005 100644
--- a/src/cache/backings/file_mapped.c
+++ b/src/cache/backings/file_mapped.c
@@ -46,14 +46,12 @@ static void file_backing_unlock(struct cch_backing *backing)
 static void file_backing_set_size(struct cch_backing *backing, off_t size, bool expand_to_size)
 {
     struct cch_backing_file *file = (struct cch_backing_file *)backing;
-    al_assert(expand_to_size || size == 0);
     nn_mutex_lock(&file->mutex);
     file->backing.size = size;
-    if ((size_t)size > file->file.size) {
+    if (expand_to_size || (size > 0 && size < file->file.size)) {
         nn_file_munmap(&file->file, file->u.map);
         nn_file_truncate(&file->file, size);
         file->u.map = nn_file_mmap(&file->file);
-        file->file.size = size;
     }
     nn_mutex_unlock(&file->mutex);
 }