diff --git a/kats/consts.py b/kats/consts.py
index 6dfbb3472..10a386ed9 100644
--- a/kats/consts.py
+++ b/kats/consts.py
@@ -341,7 +341,7 @@ def __init__(  # noqa C901
                 and all(is_numeric_dtype(self.value[col]) for col in self.value)
             )
         ):
-            msg = f"Time series data is type {self.value.dtype} but must be numeric"
+            msg = f"Time series data is type {self.value[col].dtype} but must be numeric"
             raise _log_error(msg)
 
         self._calc_min_max_values()