diff --git a/src/dotscan.lpp b/src/dotscan.lpp
index dede564..23754bc 100644
--- a/src/dotscan.lpp
+++ b/src/dotscan.lpp
@@ -22,14 +22,14 @@ float		[0-9]*\.[0-9]+
 "node"			return NODE;
 "->"			return DIR_EDGE;
 "--"			return UNDIR_EDGE;
-{name}			{ yylval.pText = new QString(yytext); return NAME; }
+{name}			{ yylval.pText = new TQString(yytext); return NAME; }
 {string}		{
-					QString str = &yytext[1];
-					yylval.pText = new QString(str.left(yyleng - 2));
+					TQString str = &yytext[1];
+					yylval.pText = new TQString(str.left(yyleng - 2));
 					return STRING;
 				}
-{number}		{ yylval.pText = new QString(yytext); return NUMBER; }
-{float}			{ yylval.pText = new QString(yytext); return NUMBER; }
+{number}		{ yylval.pText = new TQString(yytext); return NUMBER; }
+{float}			{ yylval.pText = new TQString(yytext); return NUMBER; }
 {space}			;
 .				return yytext[0];