diff --git a/src/backends/R/rexpression.cpp b/src/backends/R/rexpression.cpp
--- a/src/backends/R/rexpression.cpp
+++ b/src/backends/R/rexpression.cpp
@@ -124,9 +124,10 @@
                 content.replace( QLatin1Char(' '), QLatin1String(" "));
                 //replace appearing backspaces, as they mess the whole output up
                 content.remove(QRegExp(QLatin1String(".\b")));
-                //Replace < and > with their html code, so they won't be confused as html tags
+                //Replace <, > and & with their html code, so they won't be confused as html tags
                 content.replace( QLatin1Char('<') ,  QLatin1String("&lt;"));
                 content.replace( QLatin1Char('>') ,  QLatin1String("&gt;"));
+                content.replace( QLatin1Char('&') ,  QLatin1String("&amp;"));
             }
 
             qDebug()<<"content: "<<content;