diff --git a/plyfile.py b/plyfile.py
index c2a1e1d..596dd30 100644
--- a/plyfile.py
+++ b/plyfile.py
@@ -1487,6 +1487,9 @@ def _lookup_type(type_str):
     ('int', 'i4'),
     ('uint32', 'u4'),
     ('uint', 'u4'),
+    ('int64', 'i8'),
+    ('uint64', 'u8'),
+    ('float16', 'f2'),
     ('float32', 'f4'),
     ('float', 'f4'),
     ('float64', 'f8'),