diff --git a/CHANGELOG.md b/CHANGELOG.md
index dfb62a1..89f6104 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,7 +13,7 @@ This project adheres to [Semantic Versioning](http://semver.org/) and
 - prefix management of `RDF.Graph`s:
 	- the structure now has `prefixes` field with an optional `RDF.PrefixMap`
 	- new functions `add_prefixes/2`, `delete_prefixes/2` and `clear_prefixes/1` 
-- configurable RDF.default_prefixes
+- configurable `RDF.default_prefixes`
 
 
 ### Changed
@@ -25,6 +25,7 @@ This project adheres to [Semantic Versioning](http://semver.org/) and
 	`prefixes` field
 - when `RDF.Graph.add` and `RDF.Graph.put` are called with another graph, its
   prefixes are merged 
+- `RDF.Turtle.Decoder` saves the prefixes now
 	
 
 
diff --git a/lib/rdf/serializations/turtle_decoder.ex b/lib/rdf/serializations/turtle_decoder.ex
index cfabde9..46bf513 100644
--- a/lib/rdf/serializations/turtle_decoder.ex
+++ b/lib/rdf/serializations/turtle_decoder.ex
@@ -47,7 +47,7 @@ defmodule RDF.Turtle.Decoder do
   def parse(tokens), do: tokens |> :turtle_parser.parse
 
   defp build_graph(ast, base) do
-    {graph, _} =
+    {graph, %State{namespaces: namespaces}} =
       Enum.reduce ast, {RDF.Graph.new, %State{base_iri: base}}, fn
         {:triples, triples_ast}, {graph, state} ->
           with {statements, state} = triples(triples_ast, state) do
@@ -56,9 +56,15 @@ defmodule RDF.Turtle.Decoder do
 
         {:directive, directive_ast}, {graph, state} ->
           {graph, directive(directive_ast, state)}
-
       end
-    {:ok, graph}
+
+    {:ok,
+      if Enum.empty?(namespaces) do
+        graph
+      else
+        RDF.Graph.add_prefixes(graph, namespaces)
+      end
+    }
   rescue
     error -> {:error, Exception.message(error)}
   end
diff --git a/test/acceptance/turtle_w3c_test.exs b/test/acceptance/turtle_w3c_test.exs
index be9d63a..d60f172 100644
--- a/test/acceptance/turtle_w3c_test.exs
+++ b/test/acceptance/turtle_w3c_test.exs
@@ -53,8 +53,12 @@ defmodule RDF.Turtle.W3C.Test do
 
        test TestSuite.test_title(test_case), %{test_case: test_case} do
          with base = to_string(TestSuite.test_input_file(test_case)) do
-           assert (TestSuite.test_input_file_path(test_case, "Turtle")  |> Turtle.read_file!(base: base)) ==
-                  (TestSuite.test_result_file_path(test_case, "Turtle") |> NTriples.read_file!)
+           assert (TestSuite.test_input_file_path(test_case, "Turtle")
+                   |> Turtle.read_file!(base: base)
+                   |> RDF.Graph.clear_prefixes()
+                  ) ==
+                  (TestSuite.test_result_file_path(test_case, "Turtle")
+                   |> NTriples.read_file!)
          end
        end
      end)
diff --git a/test/unit/turtle_decoder_test.exs b/test/unit/turtle_decoder_test.exs
index 45da44e..8356de4 100644
--- a/test/unit/turtle_decoder_test.exs
+++ b/test/unit/turtle_decoder_test.exs
@@ -218,7 +218,7 @@ defmodule RDF.Turtle.DecoderTest do
       assert Turtle.Decoder.decode!("""
         PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>
         <http://example.org/#spiderman> <http://example.org/#p> "42"^^xsd:integer .
-        """) == Graph.new({EX.spiderman, EX.p, RDF.literal(42)})
+        """) == Graph.new({EX.spiderman, EX.p, RDF.literal(42)}, prefixes: %{xsd: XSD})
     end
 
     test "a language tagged literal" do
@@ -270,38 +270,39 @@ defmodule RDF.Turtle.DecoderTest do
 
   describe "prefixed names" do
     test "non-empty prefixed names" do
+      prefixes = RDF.PrefixMap.new(ex: ~I<http://example.org/#>)
       assert Turtle.Decoder.decode!("""
         @prefix ex: <http://example.org/#> .
         ex:Aaron <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> ex:Person .
-      """) == Graph.new({EX.Aaron, RDF.type, EX.Person})
+      """) == Graph.new({EX.Aaron, RDF.type, EX.Person}, prefixes: prefixes)
 
       assert Turtle.Decoder.decode!("""
         @prefix  ex:  <http://example.org/#> .
         ex:Aaron <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> ex:Person .
-      """) == Graph.new({EX.Aaron, RDF.type, EX.Person})
+      """) == Graph.new({EX.Aaron, RDF.type, EX.Person}, prefixes: prefixes)
 
       assert Turtle.Decoder.decode!("""
         PREFIX ex: <http://example.org/#>
         ex:Aaron <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> ex:Person .
-      """) == Graph.new({EX.Aaron, RDF.type, EX.Person})
+      """) == Graph.new({EX.Aaron, RDF.type, EX.Person}, prefixes: prefixes)
 
       assert Turtle.Decoder.decode!("""
         prefix ex: <http://example.org/#>
         ex:Aaron <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> ex:Person .
-      """) == Graph.new({EX.Aaron, RDF.type, EX.Person})
-
+      """) == Graph.new({EX.Aaron, RDF.type, EX.Person}, prefixes: prefixes)
     end
 
     test "empty prefixed name" do
+      prefixes = RDF.PrefixMap.new("": ~I<http://example.org/#>)
       assert Turtle.Decoder.decode!("""
         @prefix : <http://example.org/#> .
         :Aaron <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> :Person .
-      """) == Graph.new({EX.Aaron, RDF.type, EX.Person})
+      """) == Graph.new({EX.Aaron, RDF.type, EX.Person}, prefixes: prefixes)
 
       assert Turtle.Decoder.decode!("""
         PREFIX : <http://example.org/#>
         :Aaron <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> :Person .
-      """) == Graph.new({EX.Aaron, RDF.type, EX.Person})
+      """) == Graph.new({EX.Aaron, RDF.type, EX.Person}, prefixes: prefixes)
     end
   end
 
@@ -318,14 +319,14 @@ defmodule RDF.Turtle.DecoderTest do
         {RDF.bnode("b1"), RDF.rest, RDF.bnode("b2")},
         {RDF.bnode("b2"), RDF.first, EX.c},
         {RDF.bnode("b2"), RDF.rest, RDF.nil},
-      ])
+      ], prefixes: %{"": ~I<http://example.org/#>})
     end
 
     test "empty collection" do
       assert Turtle.Decoder.decode!("""
         @prefix : <http://example.org/#> .
         :subject :predicate () .
-      """) == Graph.new({EX.subject, EX.predicate, RDF.nil})
+      """) == Graph.new({EX.subject, EX.predicate, RDF.nil}, prefixes: %{"": ~I<http://example.org/#>})
     end
 
     test "nested collection" do
@@ -343,7 +344,7 @@ defmodule RDF.Turtle.DecoderTest do
         {RDF.bnode("b1"), RDF.rest, RDF.bnode("b2")},
         {RDF.bnode("b2"), RDF.first, EX.c},
         {RDF.bnode("b2"), RDF.rest, RDF.nil},
-      ])
+      ], prefixes: %{"": ~I<http://example.org/#>})
     end
   end