diff --git a/src/plugins/wp/GuiTactic.ml b/src/plugins/wp/GuiTactic.ml
index cd14d8126cfd5ca69012706ae4ba04ef3ff8c631..8484deedffa91668367340b37887826381e581a7 100644
--- a/src/plugins/wp/GuiTactic.ml
+++ b/src/plugins/wp/GuiTactic.ml
@@ -89,7 +89,7 @@ class checkbox
         begin
           Wutil.on enabled button#set_visible ;
           Wutil.on tooltip button#set_tooltip ;
-          ignore title ;
+          Wutil.on title button#set_label ;
           ignore filter ;
           ignore vmin ;
           ignore vmax ;