diff --git a/src/index/src/bloom_filter/applier.rs b/src/index/src/bloom_filter/applier.rs
index 28a7291922d3..880c7443f5a9 100644
--- a/src/index/src/bloom_filter/applier.rs
+++ b/src/index/src/bloom_filter/applier.rs
@@ -55,7 +55,7 @@ impl BloomFilterApplier {
 
         // 2. Calculate bloom filter segment locations
         let mut segment_locations = Vec::new();
-        for (&row_group_idx, _) in basement {
+        for &row_group_idx in basement.keys() {
             // TODO(ruihang): support further filter over row selection
 
             // todo: dedup & overlap