diff --git a/setup.py b/setup.py
index 5274bebda..e98214c94 100644
--- a/setup.py
+++ b/setup.py
@@ -45,6 +45,11 @@ exts = [
               ["spacy/en.pyx", "ext/MurmurHash3.cpp", "ext/MurmurHash2.cpp"],
               language="c++",
               include_dirs=[path.join(HERE, 'ext')]),
+    Extension("spacy.en_ptb",
+              ["spacy/en_ptb.pyx", "ext/MurmurHash3.cpp", "ext/MurmurHash2.cpp"],
+              language="c++",
+              include_dirs=[path.join(HERE, 'ext')]),
+ 
     Extension("spacy.lexeme", ["spacy/lexeme.pyx"], language="c++", include_dirs=includes),
     Extension("spacy.spacy",
              ["spacy/spacy.pyx", "ext/MurmurHash3.cpp", "ext/MurmurHash2.cpp"],