diff --git a/sstables/index_reader.hh b/sstables/index_reader.hh
index 3eb307626f..03b7d6dcd1 100644
--- a/sstables/index_reader.hh
+++ b/sstables/index_reader.hh
@@ -718,7 +718,7 @@ public:
             return make_ready_future<>();
         }
 
-        auto cmp_with_start = [pos_cmp = promoted_index_block_compare(s), s]
+        auto cmp_with_start = [pos_cmp = promoted_index_block_compare(s), &s]
                 (position_in_partition_view pos, const promoted_index_block& info) -> bool {
             return pos_cmp(pos, info.start(s));
         };