diff --git a/xml2xslt.xsl b/xml2xslt.xsl
index cc051fd..07fe3a1 100644
--- a/xml2xslt.xsl
+++ b/xml2xslt.xsl
@@ -414,9 +414,12 @@
 \usepackage{boxedminipage}
 \usepackage{parskip}            % Space-separated rather than indented paragraphs.
 \usepackage{rotating}		    % Rotate stuff.
-\usepackage{amsmath}            % For nicer maths.
 \usepackage{microtype}          % For better typesetting in general.
 
+\makeatletter
+\@ifpackageloaded{amsmath}{}{\usepackage{amsmath}}
+\makeatother
+
 </xsl-out:text>
 
 							<xsl-out:call-template name="latex-preamble" />