diff --git a/src/gui_kde_wid.cc b/src/gui_kde_wid.cc
index 52d1c9e..abaaa50 100644
--- a/src/gui_kde_wid.cc
+++ b/src/gui_kde_wid.cc
@@ -1540,7 +1540,7 @@
     }
 
     connect(sb->w, SIGNAL(valueChanged(int)), &mapper, SLOT(map()));
-    mapper.setMapping(sb->w, (int)sb);
+    mapper.setMapping(sb->w, (long)sb);
 }//}}}