diff --git a/searchcore/src/vespa/searchcore/proton/matching/queryenvironment.cpp b/searchcore/src/vespa/searchcore/proton/matching/queryenvironment.cpp
index 83e8bf38b4f5..0bda095c6d6c 100644
--- a/searchcore/src/vespa/searchcore/proton/matching/queryenvironment.cpp
+++ b/searchcore/src/vespa/searchcore/proton/matching/queryenvironment.cpp
@@ -49,10 +49,10 @@ QueryEnvironment::getAttributeContext() const
     return _attrContext;
 }
 
-double
-QueryEnvironment::get_average_field_length(const std::string &field_name) const
+search::index::FieldLengthInfo
+QueryEnvironment::get_field_length_info(const std::string &field_name) const
 {
-    return _field_length_inspector.get_field_length_info(field_name).get_average_field_length();
+    return _field_length_inspector.get_field_length_info(field_name);
 }
 
 const search::fef::IIndexEnvironment &
diff --git a/searchcore/src/vespa/searchcore/proton/matching/queryenvironment.h b/searchcore/src/vespa/searchcore/proton/matching/queryenvironment.h
index 776b14280fa8..4323e0c8e3d4 100644
--- a/searchcore/src/vespa/searchcore/proton/matching/queryenvironment.h
+++ b/searchcore/src/vespa/searchcore/proton/matching/queryenvironment.h
@@ -76,7 +76,7 @@ class QueryEnvironment : public search::fef::IQueryEnvironment
     // inherited from search::fef::IQueryEnvironment
     const search::attribute::IAttributeContext & getAttributeContext() const override;
 
-    double get_average_field_length(const std::string &field_name) const override;
+    search::index::FieldLengthInfo get_field_length_info(const std::string &field_name) const override;
 
     // inherited from search::fef::IQueryEnvironment
     const search::fef::IIndexEnvironment & getIndexEnvironment() const override;
diff --git a/searchlib/src/tests/features/bm25/bm25_test.cpp b/searchlib/src/tests/features/bm25/bm25_test.cpp
index d6da8beb0ef6..21d42439fbff 100644
--- a/searchlib/src/tests/features/bm25/bm25_test.cpp
+++ b/searchlib/src/tests/features/bm25/bm25_test.cpp
@@ -96,10 +96,11 @@ TEST_F(Bm25BlueprintTest, blueprint_can_prepare_shared_state_with_average_field_
 {
     auto blueprint = expect_setup_succeed({"is"});
     test::QueryEnvironment query_env;
-    query_env.get_avg_field_lengths()["is"] = 10;
+    query_env.get_field_length_info_map()["is"] =
+        search::index::FieldLengthInfo(10.0, 10.0, 1);
     ObjectStore store;
     blueprint->prepareSharedState(query_env, store);
-    EXPECT_DOUBLE_EQ(10, as_value<double>(*store.get("bm25.afl.is")));
+    EXPECT_DOUBLE_EQ(10.0, as_value<double>(*store.get("bm25.afl.is")));
 }
 
 TEST_F(Bm25BlueprintTest, dump_features_for_all_index_fields)
diff --git a/searchlib/src/vespa/searchlib/features/bm25_feature.cpp b/searchlib/src/vespa/searchlib/features/bm25_feature.cpp
index 37549b05bab7..be158ebb8759 100644
--- a/searchlib/src/vespa/searchlib/features/bm25_feature.cpp
+++ b/searchlib/src/vespa/searchlib/features/bm25_feature.cpp
@@ -201,6 +201,13 @@ make_avg_field_length_key(const std::string& base_name, const std::string& field
     return base_name + ".afl." + field_name;
 }
 
+double
+get_average_field_length(const search::fef::IQueryEnvironment& env, const std::string& field_name)
+{
+    auto info = env.get_field_length_info(field_name);
+    return info.get_average_field_length();
+}
+
 }
 
 void
@@ -208,7 +215,7 @@ Bm25Blueprint::prepareSharedState(const fef::IQueryEnvironment& env, fef::IObjec
 {
     std::string key = make_avg_field_length_key(getBaseName(), _field->name());
     if (store.get(key) == nullptr) {
-        double avg_field_length = _avg_field_length.value_or(env.get_average_field_length(_field->name()));
+        double avg_field_length = _avg_field_length.value_or(get_average_field_length(env, _field->name()));
         store.add(key, std::make_unique<AnyWrapper<double>>(avg_field_length));
     }
 }
@@ -219,7 +226,7 @@ Bm25Blueprint::createExecutor(const fef::IQueryEnvironment& env, vespalib::Stash
     const auto* lookup_result = env.getObjectStore().get(make_avg_field_length_key(getBaseName(), _field->name()));
     double avg_field_length = lookup_result != nullptr ?
                               as_value<double>(*lookup_result) :
-                              _avg_field_length.value_or(env.get_average_field_length(_field->name()));
+                              _avg_field_length.value_or(get_average_field_length(env, _field->name()));
     return stash.create<Bm25Executor>(*_field, env, avg_field_length, _k1_param, _b_param);
 }
 
diff --git a/searchlib/src/vespa/searchlib/fef/iqueryenvironment.h b/searchlib/src/vespa/searchlib/fef/iqueryenvironment.h
index ee6c484b164a..78dff3a5ba0c 100644
--- a/searchlib/src/vespa/searchlib/fef/iqueryenvironment.h
+++ b/searchlib/src/vespa/searchlib/fef/iqueryenvironment.h
@@ -5,6 +5,7 @@
 #include "iindexenvironment.h"
 #include "objectstore.h"
 #include <vespa/searchcommon/attribute/iattributecontext.h>
+#include <vespa/searchlib/index/field_length_info.h>
 
 namespace search::common { struct GeoLocationSpec; }
 
@@ -80,7 +81,7 @@ class IQueryEnvironment
      *
      * @return average field length
      **/
-    virtual double get_average_field_length(const std::string &field_name) const = 0;
+    virtual index::FieldLengthInfo get_field_length_info(const std::string &field_name) const = 0;
 
     /**
      * Returns a const view of the index environment.
diff --git a/searchlib/src/vespa/searchlib/fef/phrase_splitter_query_env.h b/searchlib/src/vespa/searchlib/fef/phrase_splitter_query_env.h
index dba428f4cea2..1dee834be291 100644
--- a/searchlib/src/vespa/searchlib/fef/phrase_splitter_query_env.h
+++ b/searchlib/src/vespa/searchlib/fef/phrase_splitter_query_env.h
@@ -77,7 +77,7 @@ class PhraseSplitterQueryEnv : public IQueryEnvironment
         return _queryEnv.getAllLocations();
     }
     const attribute::IAttributeContext & getAttributeContext() const override { return _queryEnv.getAttributeContext(); }
-    double get_average_field_length(const std::string &field_name) const override { return _queryEnv.get_average_field_length(field_name); }
+    index::FieldLengthInfo get_field_length_info(const std::string &field_name) const override { return _queryEnv.get_field_length_info(field_name); }
     const IIndexEnvironment & getIndexEnvironment() const override { return _queryEnv.getIndexEnvironment(); }
 
     // Accessor methods used by PhraseSplitter
diff --git a/searchlib/src/vespa/searchlib/fef/test/queryenvironment.h b/searchlib/src/vespa/searchlib/fef/test/queryenvironment.h
index fb96a7bd060e..03ea9754626f 100644
--- a/searchlib/src/vespa/searchlib/fef/test/queryenvironment.h
+++ b/searchlib/src/vespa/searchlib/fef/test/queryenvironment.h
@@ -26,7 +26,7 @@ class QueryEnvironment : public IQueryEnvironment
     Properties                  _properties;
     std::vector<GeoLocationSpec> _locations;
     search::attribute::IAttributeContext::UP _attrCtx;
-    std::unordered_map<std::string, double> _avg_field_lengths;
+    std::unordered_map<std::string, index::FieldLengthInfo> _field_length_info;
 
 public:
     /**
@@ -48,12 +48,12 @@ class QueryEnvironment : public IQueryEnvironment
         return locations;
     }
     const search::attribute::IAttributeContext &getAttributeContext() const override { return *_attrCtx; }
-    double get_average_field_length(const std::string& field_name) const override {
-        auto itr = _avg_field_lengths.find(field_name);
-        if (itr != _avg_field_lengths.end()) {
+    index::FieldLengthInfo get_field_length_info(const std::string& field_name) const override {
+        auto itr = _field_length_info.find(field_name);
+        if (itr != _field_length_info.end()) {
             return itr->second;
         }
-        return 1.0;
+        return index::FieldLengthInfo(1.0, 1.0, 1);
     }
     const IIndexEnvironment &getIndexEnvironment() const override { assert(_indexEnv != NULL); return *_indexEnv; }
 
@@ -92,7 +92,7 @@ class QueryEnvironment : public IQueryEnvironment
     /** Returns a reference to the location of this. */
     void addLocation(const GeoLocationSpec &spec) { _locations.push_back(spec); }
 
-    std::unordered_map<std::string, double>& get_avg_field_lengths() { return _avg_field_lengths; }
+    std::unordered_map<std::string, index::FieldLengthInfo>& get_field_length_info_map() { return _field_length_info; }
 };
 
 }
diff --git a/searchlib/src/vespa/searchlib/fef/test/queryenvironmentbuilder.cpp b/searchlib/src/vespa/searchlib/fef/test/queryenvironmentbuilder.cpp
index d6912867eaa2..a168ab713682 100644
--- a/searchlib/src/vespa/searchlib/fef/test/queryenvironmentbuilder.cpp
+++ b/searchlib/src/vespa/searchlib/fef/test/queryenvironmentbuilder.cpp
@@ -79,7 +79,7 @@ QueryEnvironmentBuilder::add_node(const FieldInfo &info)
 QueryEnvironmentBuilder&
 QueryEnvironmentBuilder::set_avg_field_length(const std::string& field_name, double avg_field_length)
 {
-    _queryEnv.get_avg_field_lengths()[field_name] = avg_field_length;
+    _queryEnv.get_field_length_info_map()[field_name] = index::FieldLengthInfo(avg_field_length, avg_field_length, 1);
     return *this;
 }
 
diff --git a/streamingvisitors/src/vespa/searchvisitor/queryenvironment.h b/streamingvisitors/src/vespa/searchvisitor/queryenvironment.h
index 6db53bbf4c04..f744c4a916af 100644
--- a/streamingvisitors/src/vespa/searchvisitor/queryenvironment.h
+++ b/streamingvisitors/src/vespa/searchvisitor/queryenvironment.h
@@ -46,7 +46,9 @@ class QueryEnvironment : public search::fef::IQueryEnvironment
 
     GeoLocationSpecPtrs getAllLocations() const override;
     const search::attribute::IAttributeContext & getAttributeContext() const override { return *_attrCtx; }
-    double get_average_field_length(const std::string &) const override { return 100.0; }
+    search::index::FieldLengthInfo get_field_length_info(const std::string &) const override {
+        return search::index::FieldLengthInfo(100.0, 100.0, 1);
+    }
     const search::fef::IIndexEnvironment & getIndexEnvironment() const override { return _indexEnv; }
     void addTerm(const search::fef::ITermData *term) { _queryTerms.push_back(term); }