diff --git a/lib/rdf/model/statement.rb b/lib/rdf/model/statement.rb
index c9d2a129..8a51c31c 100644
--- a/lib/rdf/model/statement.rb
+++ b/lib/rdf/model/statement.rb
@@ -57,6 +57,9 @@ def self.from(statement, graph_name: nil, **options)
     # @return [RDF::Term]
     attr_accessor :object
 
+    # @return [Hash{Symbol => Object}]
+    attr_accessor :options
+
     ##
     # @overload initialize(**options)
     #   @param  [Hash{Symbol => Object}] options
diff --git a/lib/rdf/repository.rb b/lib/rdf/repository.rb
index bd4f63b8..bf55133b 100644
--- a/lib/rdf/repository.rb
+++ b/lib/rdf/repository.rb
@@ -325,8 +325,8 @@ def each_statement(&block)
           @data.each do |g, ss|
             ss.each do |s, ps|
               ps.each do |p, os|
-                os.each do |o|
-                  yield RDF::Statement.new(s, p, o, graph_name: g.equal?(DEFAULT_GRAPH) ? nil : g)
+                os.each do |o, object_options|
+                  yield RDF::Statement.new(s, p, o, object_options.merge(graph_name: g.equal?(DEFAULT_GRAPH) ? nil : g))
                 end
               end
             end
@@ -403,9 +403,9 @@ def query_pattern(pattern, **options, &block)
                      []
                    end
               ps.each do |p, os|
-                os.each do |o|
+                os.each do |o, object_options|
                   next unless object.nil? || object.eql?(o)
-                  yield RDF::Statement.new(s, p, o, graph_name: c.equal?(DEFAULT_GRAPH) ? nil : c)
+                  yield RDF::Statement.new(s, p, o, object_options.merge(graph_name: c.equal?(DEFAULT_GRAPH) ? nil : c))
                 end
               end
             end
@@ -462,7 +462,7 @@ def has_statement_in?(data, statement)
         data.has_key?(g) &&
           data[g].has_key?(s) &&
           data[g][s].has_key?(p) &&
-          data[g][s][p].include?(o)
+          data[g][s][p].has_key?(o)
       end
 
       ##
@@ -476,9 +476,9 @@ def insert_to(data, statement)
           c ||= DEFAULT_GRAPH
           
           return data.put(c) do |subs|
-            subs = (subs || Hamster::Hash.new).put(s) do |preds|
-              preds = (preds || Hamster::Hash.new).put(p) do |objs|
-                (objs || Hamster::Set.new).add(o)
+            (subs || Hamster::Hash.new).put(s) do |preds|
+              (preds || Hamster::Hash.new).put(p) do |objs|
+                (objs || Hamster::Hash.new).put(o, statement.options)
               end
             end
           end
diff --git a/spec/repository_spec.rb b/spec/repository_spec.rb
index 85ef10ca..d2d53974 100644
--- a/spec/repository_spec.rb
+++ b/spec/repository_spec.rb
@@ -55,4 +55,11 @@
       expect(solutions.size).to eq unnamed_statements.size
     end
   end
+
+  it "remembers statement obtions" do
+    subject << existing_statement = RDF::Statement(:s, RDF.type, :o, inferred: true)
+    expect(subject).to have_statement(existing_statement)
+    expect(subject.statements.first).to eq existing_statement
+    expect(subject.statements.first).to be_inferred
+  end
 end