diff --git a/src/common/menucmn.cpp b/src/common/menucmn.cpp
index 60dfd05bdb..094271d0f7 100644
--- a/src/common/menucmn.cpp
+++ b/src/common/menucmn.cpp
@@ -131,7 +131,7 @@ wxAcceleratorEntry *wxGetAccelFromString(const wxString& label)
                 current.clear();
             }
             else {
-                current += wxTolower(label[n]);
+                current += (wxChar) wxTolower(label[n]);
             }
         }