diff -r e258050a3076 -r 06d6b1242dcf doc-src/IsarRef/style.sty
--- a/doc-src/IsarRef/style.sty	Fri May 02 22:47:23 2008 +0200
+++ b/doc-src/IsarRef/style.sty	Fri May 02 22:47:58 2008 +0200
@@ -44,6 +44,8 @@
 \newcommand{\isasymDEFINITION}{\isakeyword{definition}}
 
 \isabellestyle{it}
+\renewcommand{\isacharunderscore}{\_}
+\renewcommand{\isacharunderscorekeyword}{\_}
 
 %%% Local Variables: 
 %%% mode: latex