1 files changed, 5 insertions, 3 deletions

diff --git a/lib/assoc_array.c b/lib/assoc_array.c
index c6659cb37033..59875eb278ea 100644
--- a/lib/assoc_array.c
+++ b/lib/assoc_array.c
@@ -768,9 +768,11 @@ all_leaves_cluster_together:
                 new_s0->index_key[i] =
                         ops->get_key_chunk(index_key, i * ASSOC_ARRAY_KEY_CHUNK_SIZE);
 
-        blank = ULONG_MAX << (level & ASSOC_ARRAY_KEY_CHUNK_MASK);
-        pr_devel("blank off [%zu] %d: %lx\n", keylen - 1, level, blank);
-        new_s0->index_key[keylen - 1] &= ~blank;
+        if (level & ASSOC_ARRAY_KEY_CHUNK_MASK) {
+                blank = ULONG_MAX << (level & ASSOC_ARRAY_KEY_CHUNK_MASK);
+                pr_devel("blank off [%zu] %d: %lx\n", keylen - 1, level, blank);
+                new_s0->index_key[keylen - 1] &= ~blank;
+        }
 
         /* This now reduces to a node splitting exercise for which we'll need
          * to regenerate the disparity table.