diff --git a/src/plaintolatexconverter.cpp b/src/plaintolatexconverter.cpp
--- a/src/plaintolatexconverter.cpp
+++ b/src/plaintolatexconverter.cpp
@@ -18,23 +18,14 @@
  */
 
 #include "plaintolatexconverter.h"
+#include <qregularexpression.h>
 
 PlainToLaTeXConverter::PlainToLaTeXConverter(void)
-{
-    // Fill the replacement map
-    //TODO Do it only once!
-    m_replaceMap.insert('$', "\\$");
-    m_replaceMap.insert('%', "\\%");
-    m_replaceMap.insert('^', "\\^");
-    m_replaceMap.insert('&', "\\&");
-    m_replaceMap.insert('_', "\\_");
-    m_replaceMap.insert('#', "\\#");
-    m_replaceMap.insert('{', "\\{");
-    m_replaceMap.insert('}', "\\}");
-    m_replaceMap.insert('~', "$\\sim$");
-}
+{}
+
+PlainToLaTeXConverter::~PlainToLaTeXConverter(void)
+{}
 
-PlainToLaTeXConverter::~PlainToLaTeXConverter(void) {}
 
 /**
  * Converts plain text to LaTeX.
@@ -44,23 +35,7 @@
 QString PlainToLaTeXConverter::ConvertToLaTeX(const QString& toConv) const
 {
     QString result(toConv);
-
-    // Replacing what must be...
-    uint sSize = result.length();
-    QMap<QChar, QString>::const_iterator mapEnd = m_replaceMap.end();
-    for(uint i = 0 ; i < sSize ; ++i)
-    {
-        QMap<QChar, QString>::const_iterator it = m_replaceMap.find(result.at(i));
-
-        if(it != mapEnd) { // The character must be replaced
-            result.replace(i, 1, *it);
-            uint len = (*it).length();
-            if(1 < len) {
-                i += len - 1;
-                sSize += len - 1;
-            }
-        }
-    }
-
+    result.replace(QRegularExpression("([$%^_#&{}])"), "\\\\1");
+    result.replace("~", "$\\sim$");
     return result;
 }