diff --git a/manual/typesetting_math.rst b/manual/typesetting_math.rst
index 7c8742dd9c..dd3d574c3a 100644
--- a/manual/typesetting_math.rst
+++ b/manual/typesetting_math.rst
@@ -7,7 +7,7 @@
 Typesetting Math in ebooks
 ============================
 
-The |app| ebook viewer has the ability to display math embedded in ebooks (ePuB
+The |app| ebook viewer has the ability to display math embedded in ebooks (ePub
 and HTML files). You can typeset the math directly with TeX or MathML or
 AsciiMath. The |app| viewer uses the excellent `MathJax
 <http://www.mathjax.org>`_ library to do this. This is a brief tutorial on
diff --git a/src/calibre/gui2/viewer/main.ui b/src/calibre/gui2/viewer/main.ui
index 2d442fa223..fe0fa62a79 100644
--- a/src/calibre/gui2/viewer/main.ui
+++ b/src/calibre/gui2/viewer/main.ui
@@ -24,6 +24,9 @@
       <property name="orientation">
        <enum>Qt::Horizontal</enum>
       </property>
+      <property name="childrenCollapsible">
+       <bool>false</bool>
+      </property>
       <widget class="TOCView" name="toc"/>
       <widget class="QFrame" name="frame">
        <property name="frameShape">