diff --git a/pyspedas/analysis/tdeflag.py b/pyspedas/analysis/tdeflag.py
index 51e58b54..83558ce3 100644
--- a/pyspedas/analysis/tdeflag.py
+++ b/pyspedas/analysis/tdeflag.py
@@ -5,7 +5,7 @@
 ----
 Allowed wildcards are ? for a single character, * from multiple characters.
 Similar to tdeflag.pro in IDL SPEDAS.
-
+Moved to PyTplot/pytplot/tplot_math, 2023-11-30
 """
 import logging
 import pyspedas
@@ -30,7 +30,7 @@ def tdeflag(names, method=None, new_names=None, suffix=None,
         If '', then pytplot variables are replaced.
         If not given, then a suffix is applied.
     suffix: str, optional
-        A suffix to apply. Default is '-clip'.
+        A suffix to apply. Default is '-deflag'.
     overwrite: bool, optional
         Replace the existing tplot name.
 
@@ -39,38 +39,7 @@ def tdeflag(names, method=None, new_names=None, suffix=None,
     None.
 
     """
-    old_names = pyspedas.tnames(names)
-
-    if len(old_names) < 1:
-        logging.error('tdeflag error: No pytplot names were provided.')
-        return
-
-    if suffix is None:
-        suffix = '-deflag'
-
-    if overwrite is not None:
-        n_names = old_names
-    elif new_names is None:
-        n_names = [s + suffix for s in old_names]
-    else:
-        n_names = new_names
-
-    if isinstance(n_names, str):
-        n_names = [n_names]
-
-    if len(n_names) != len(old_names):
-        n_names = [s + suffix for s in old_names]
-
-    for i in range(len(old_names)):
-        alldata = pytplot.get_data(old_names[i])
-        time = alldata[0]
-        data = alldata[1]
-        new_time = []
-        new_data = []
-        for j in range(len(time)):
-            if not numpy.isnan(data[j]):
-                new_time.append(time[j])
-                new_data.append(data[j])
-        pytplot.store_data(n_names[i], data={'x': new_time, 'y': new_data})
-
-        logging.info('tdeflag was applied to: ' + n_names[i])
+    logging.info("tdeflag has been moved to the pytplot.tplot_math module. Please update your imports!")
+    logging.info("This version will eventually be removed.")
+    pytplot.tplot_math.tdeflag(names,method=method,new_names=new_names,
+                               suffix=suffix,overwrite=overwrite)