diff --git a/data/maker/__init__.py b/data/maker/__init__.py
index 42af8f9..1eea945 100644
--- a/data/maker/__init__.py
+++ b/data/maker/__init__.py
@@ -305,7 +305,7 @@ class Generator (Learner):
             else:
                 # print (_item)
                 pass
-        _df = _df.replace('NaT','')
+        _df = _df.replace('NaT','').replace('NA','')
         
         if r :
             self.log(**{'action':'format','input':r})