diff --git a/lib/zstd-ruby/stream_writer.rb b/lib/zstd-ruby/stream_writer.rb
index 3e379bf..78ac4db 100644
--- a/lib/zstd-ruby/stream_writer.rb
+++ b/lib/zstd-ruby/stream_writer.rb
@@ -3,7 +3,7 @@ module Zstd
   class StreamWriter
     def initialize(io, level: nil)
       @io = io
-      @stream = Zstd::StreamingCompress.new(level)
+      @stream = Zstd::StreamingCompress.new(level: level)
     end
 
     def write(*data)
diff --git a/spec/zstd-ruby-stream_writer_spec.rb b/spec/zstd-ruby-stream_writer_spec.rb
index 369aab5..3c555fb 100644
--- a/spec/zstd-ruby-stream_writer_spec.rb
+++ b/spec/zstd-ruby-stream_writer_spec.rb
@@ -13,4 +13,14 @@
       expect(Zstd.decompress(io.read)).to eq('abcdef')
     end
   end
+  describe 'level' do
+    it 'should work' do
+      io = StringIO.new
+      stream = Zstd::StreamWriter.new(io, level: 5)
+      stream.write("abcdef")
+      stream.finish
+      io.rewind
+      expect(Zstd.decompress(io.read)).to eq('abcdef')
+    end
+  end
 end