diff --git a/src/filter_result_iterator.cpp b/src/filter_result_iterator.cpp
index 1c7cbc7a..d0037512 100644
--- a/src/filter_result_iterator.cpp
+++ b/src/filter_result_iterator.cpp
@@ -553,7 +553,7 @@ void filter_result_iterator_t::init() {
             return;
         }
 
-        filter_result.count = index->seq_ids->num_ids();
+        approx_filter_ids_length = filter_result.count = index->seq_ids->num_ids();
         filter_result.docs = index->seq_ids->uncompress();
 
         seq_id = filter_result.docs[result_index];
@@ -1322,6 +1322,8 @@ filter_result_iterator_t &filter_result_iterator_t::operator=(filter_result_iter
     status = std::move(obj.status);
     is_filter_result_initialized = obj.is_filter_result_initialized;
 
+    approx_filter_ids_length = obj.approx_filter_ids_length;
+
     return *this;
 }
 
diff --git a/src/index.cpp b/src/index.cpp
index 9e041f8e..1808f83b 100644
--- a/src/index.cpp
+++ b/src/index.cpp
@@ -2855,7 +2855,7 @@ Option<bool> Index::search(std::vector<query_tokens_t>& field_query_tokens, cons
                                                                       store, doc_id_prefix, filter_tree_root);
 
             filter_result_iterator = filter_result_iterator_t(collection_name, this, filter_tree_root);
-            approx_filter_ids_length = filter_result_iterator.is_valid;
+            approx_filter_ids_length = filter_result_iterator.approx_filter_ids_length;
         }
 
         collate_included_ids({}, included_ids_map, curated_topster, searched_queries);
@@ -2977,6 +2977,7 @@ Option<bool> Index::search(std::vector<query_tokens_t>& field_query_tokens, cons
         if (no_filters_provided) {
             delete filter_tree_root;
             filter_tree_root = nullptr;
+            approx_filter_ids_length = 0;
         }
 
         uint32_t _all_result_ids_len = all_result_ids_len;