diff --git a/src/@dseries/lineartrend.m b/src/@dseries/lineartrend.m
index 96bb8a5a9c509c860ab08feccfb1528d344747e4..593ac2c1a07416259917bf154c1f1871347dd928 100644
--- a/src/@dseries/lineartrend.m
+++ b/src/@dseries/lineartrend.m
@@ -35,7 +35,7 @@ return
 %@test:1
 a = dseries(randn(100,3));
 try
-    trend = o.lineartrend;
+    trend = a.lineartrend;
     t(1) = 1;
 catch
     t(1) = 0;