diff --git a/matlab/@dynSeries/extract.m b/matlab/@dynSeries/extract.m
index 1244040ea..b6e7929bb 100644
--- a/matlab/@dynSeries/extract.m
+++ b/matlab/@dynSeries/extract.m
@@ -75,7 +75,9 @@ for i=1:nargin-1
         end
         VariableName_ = vertcat(VariableName_,VariableName);
     else
-        if ~isempty(idArobase)
+        if isempty(idArobase)
+            VariableName_ = varargin(:);
+        else
             error('dynSeries::extract: Cannot handle more than one regular expression!')
         end
     end