diff --git a/src/mapscript/python/pymodule.i b/src/mapscript/python/pymodule.i
index c73a218b44..0555fe8a22 100644
--- a/src/mapscript/python/pymodule.i
+++ b/src/mapscript/python/pymodule.i
@@ -88,7 +88,7 @@ CreateTupleFromDoubleArray( double *first, unsigned int size ) {
   PyObject *r;
   r = CreateTupleFromDoubleArray(*$1, *$2);
   free(*$1);
-  $result = SWIG_Python_AppendOutput($result,r);
+  $result = SWIG_Python_AppendOutput($result,r,1);
 }
 
 /*