diff --git a/src/@dseries/subsref.m b/src/@dseries/subsref.m
index 4a73dafd0548cd59d1ab0c6745121ea14cd9572d..97b5b1f03ac81008031d6e344eac01031b683cff 100644
--- a/src/@dseries/subsref.m
+++ b/src/@dseries/subsref.m
@@ -103,6 +103,7 @@ switch S(1).type
             'detrend','detrend_', ...
             'exist', ...
             'mean', ...
+            'nanmean', ...
             'std', ...
             'center','center_', ...
             'log','log_', ...