diff --git a/gui-doc/mrlib/scribblings/switchable-button.scrbl b/gui-doc/mrlib/scribblings/switchable-button.scrbl
index 093ec599..4cdc815a 100644
--- a/gui-doc/mrlib/scribblings/switchable-button.scrbl
+++ b/gui-doc/mrlib/scribblings/switchable-button.scrbl
@@ -8,7 +8,7 @@
 @defclass[switchable-button% canvas% ()]{
   
   A @racket[switchable-button%] control displays
-  and icon and a string label. It toggles between
+  an icon and a string label. It toggles between
   display of just the icon and a display with the 
   label and the icon side-by-side.