--- loncom/xml/lonxml.pm	2016/02/20 00:12:45	1.555
+++ loncom/xml/lonxml.pm	2016/08/09 23:43:39	1.556
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # XML Parser Module 
 #
-# $Id: lonxml.pm,v 1.555 2016/02/20 00:12:45 raeburn Exp $
+# $Id: lonxml.pm,v 1.556 2016/08/09 23:43:39 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -345,9 +345,9 @@ sub latex_special_symbols {
     } else {
 	$string=~s/\\/\\ensuremath{\\backslash}/g;
 	$string=~s/\\\%|\%/\\\%/g;
-	$string=~s/\\{|{/\\{/g;
+	$string=~s/\\\{|\{/\\{/g;
 	$string=~s/\\}|}/\\}/g;
-	$string=~s/\\ensuremath\\{\\backslash\\}/\\ensuremath{\\backslash}/g;
+	$string=~s/\\ensuremath\\\{\\backslash\\}/\\ensuremath{\\backslash}/g;
 	$string=~s/\\\$|\$/\\\$/g;
 	$string=~s/\\\_|\_/\\\_/g;
         $string=~s/([^\\]|^)(\~|\^)/$1\\$2\\strut /g;