diff --git a/src/figlatex.dtx b/src/figlatex.dtx
index 94da37c08e0d5225429afa6fe67bc4d123c0b056..e18acdf397312247e02a9e8c94d1b9cf8e97a345 100644
--- a/src/figlatex.dtx
+++ b/src/figlatex.dtx
@@ -100,12 +100,17 @@
 % This package allows \LaTeX\space to load XFig and SVG figures (or
 % subfigures) with the |\includegraphics| command.  
 % \end{abstract}
-% \CheckSum{217}
+% \CheckSum{218}
 %
 % \changes{v0.1.1}{2005/03/28}{Version 0.1.1 at last}
 % \changes{v0.1.2}{2005/03/29}{Manage index/glossary}
 % \changes{v0.1.3}{2008/01/28}{Better support for subfig with texdepends}
 % \changes{v0.1.4}{2011/09/25}{Support for svg with texdepends}
+% \changes{v2.2.0}{2016/02/09}{No changes in figlatex.dtx}
+% \changes{v2.2.1}{2016/02/09}{No changes in figlatex.dtx}
+% \changes{v2.2.2}{2016/02/09}{No changes in figlatex.dtx}
+% \changes{v2.2.3}{2017/01/08}{No changes in figlatex.dtx}
+% \changes{v2.2.4}{2017/06/20}{Add missing required package 'ifthen'}
 %
 % \makeatletter
 % \def\SpecialOptionIndex#1{\@bsphack
@@ -269,6 +274,7 @@
 %    \end{macrocode}
 % and requires some packages
 %    \begin{macrocode}
+\RequirePackage{ifthen}
 \RequirePackage{ifpdf}
 \RequirePackage{graphicx}
 %    \end{macrocode}