diff --git a/src/DGtal/base/OrderedAlphabet.ih b/src/DGtal/base/OrderedAlphabet.ih
index 45cceb0457..82fe5199f2 100644
--- a/src/DGtal/base/OrderedAlphabet.ih
+++ b/src/DGtal/base/OrderedAlphabet.ih
@@ -591,7 +591,7 @@ DGtal::OrderedAlphabet::nextEdge( size_t & nb_a1,
             index_t & s,
             bool & cvx )
 {
-  ModuloComputer< Integer > mc( (const unsigned int)w.size() );
+  ModuloComputer< Integer > mc( (unsigned int)w.size() );
   size_t l;
   size_t len;
   size_t nb;