diff --git a/tradedb.py b/tradedb.py
index ddcd4d7e..4cd1523c 100644
--- a/tradedb.py
+++ b/tradedb.py
@@ -170,7 +170,7 @@ def __init__(
         self.ID = ID
         self.dbname = dbname
         self.posX, self.posY, self.posZ = posX, posY, posZ
-        if haveNumpy:
+        if ary:
             self.pos = ary([posX, posY, posZ], nptype)
         self.addedID = addedID or 0
         self.stations = ()