diff --git a/lib/sqlite3/database.rb b/lib/sqlite3/database.rb
index 01519882..29c7341e 100644
--- a/lib/sqlite3/database.rb
+++ b/lib/sqlite3/database.rb
@@ -395,6 +395,9 @@ def step( *args )
 
         def finalize
           super(@ctx)
+          result = @ctx.result
+          @ctx = FunctionProxy.new
+          result
         end
       })
       proxy.ctx = FunctionProxy.new
diff --git a/test/test_integration.rb b/test/test_integration.rb
index 5f707aff..9bd3c3a8 100644
--- a/test/test_integration.rb
+++ b/test/test_integration.rb
@@ -499,6 +499,10 @@ def test_create_aggregate_without_block
 
     value = @db.get_first_value( "select accumulate(a) from foo" )
     assert_equal 6, value
+
+    # calling #get_first_value twice don't add up to the latest result
+    value = @db.get_first_value( "select accumulate(a) from foo" )
+    assert_equal 6, value
   end
 
   def test_create_aggregate_with_block