diff --git a/src/tools/qlalr/lalr.cpp b/src/tools/qlalr/lalr.cpp
index 81975a0f2ac..0ccf4c1588d 100644
--- a/src/tools/qlalr/lalr.cpp
+++ b/src/tools/qlalr/lalr.cpp
@@ -187,7 +187,7 @@ Grammar::Grammar ():
 
   tk_end = intern ("$end");
   terminals.insert (tk_end);
-  spells.insert (tk_end, "end of file");
+  spells.insert (tk_end, QLatin1String("end of file"));
 
   /*tk_error= terminals.insert (intern ("error"))*/;
 }
diff --git a/src/tools/qlalr/lalr.h b/src/tools/qlalr/lalr.h
index 28c889e63fb..b303b897d40 100644
--- a/src/tools/qlalr/lalr.h
+++ b/src/tools/qlalr/lalr.h
@@ -337,6 +337,7 @@ public:
   Grammar ();
 
   Name intern (const QString &id);
+  Name intern (const char *id) { return intern(QString::fromUtf8(id)); }
 
   inline bool isTerminal (Name name) const
   { return terminals.find (name) != terminals.end (); }
diff --git a/src/tools/qlalr/main.cpp b/src/tools/qlalr/main.cpp
index e16d5f1e8d0..c16bdcdf17e 100644
--- a/src/tools/qlalr/main.cpp
+++ b/src/tools/qlalr/main.cpp
@@ -65,7 +65,7 @@ int main (int argc, char *argv[])
   bool no_lines = false;
   bool debug_info = true;
   bool qt_copyright = false;
-  QString file_name = 0;
+  QString file_name;
 
   const QStringList args = app.arguments().mid(1);
   for (const QString &arg : args) {
diff --git a/src/tools/qlalr/recognizer.cpp b/src/tools/qlalr/recognizer.cpp
index ca2551707e8..69dad1a6c18 100644
--- a/src/tools/qlalr/recognizer.cpp
+++ b/src/tools/qlalr/recognizer.cpp
@@ -178,7 +178,8 @@ int Recognizer::nextToken()
 
       text.clear ();
       if (! _M_no_lines)
-        text += QLatin1String ("\n#line ") + QString::number (_M_action_line) + " \"" + _M_input_file + "\"\n";
+        text += QLatin1String("\n#line ") + QString::number (_M_action_line)
+                + QLatin1String(" \"") + _M_input_file + QLatin1String("\"\n");
       inp (); // skip ':'
 
       forever
@@ -215,7 +216,8 @@ int Recognizer::nextToken()
 
       text.clear ();
       if (! _M_no_lines)
-        text += QLatin1String ("\n#line ") + QString::number (_M_action_line) + " \"" + _M_input_file + "\"\n";
+        text += QLatin1String ("\n#line ") + QString::number (_M_action_line) +
+                QLatin1String(" \"") + _M_input_file + QLatin1String("\"\n");
 
       inp (); // skip ':'