diff --git a/doc/README.tab b/doc/README.tab
index 852b801..7d0a177 100644
--- a/doc/README.tab
+++ b/doc/README.tab
@@ -31,7 +31,7 @@ You can operate with mouse:
 left button		move the tab if you click on the tab
 			dragging a tab to another tab will move tab
 			dragging a link to tab will open the link in the tab
-			clicking on right upper `x' will current tab
+			clicking on right upper 'x' will current tab
 middle button		close the tab if you clink on the tab
 right button		open menu as usual