diff --git a/adi/ad719x.py b/adi/ad719x.py
index 8e90240a5..beade3eb2 100644
--- a/adi/ad719x.py
+++ b/adi/ad719x.py
@@ -97,7 +97,7 @@ def to_volts(self, index, val):
             ret = (val+_offset)/1000 * _scale
 
         if isinstance(val, np.ndarray):
-            ret = [(x+offset)/1000 * _scale for x in val]
+            ret = [((x+_offset)/1000) * _scale for x in val]
 
         if ret is None:
             raise Exception("Error in converting to actual voltage")