diff --git a/plyfile.py b/plyfile.py
index ec9c5b7..589b6ff 100644
--- a/plyfile.py
+++ b/plyfile.py
@@ -43,6 +43,8 @@
     ('int', 'i4'),
     ('uint32', 'u4'),
     ('uint', 'u4'),
+    ('int64', 'i8'),
+    ('uint64', 'u8'),
     ('float32', 'f4'),
     ('float', 'f4'),
     ('float64', 'f8'),