diff --git a/src/kqalculate.cpp b/src/kqalculate.cpp
index faf16f0..87dbc6e 100644
--- a/src/kqalculate.cpp
+++ b/src/kqalculate.cpp
@@ -6626,10 +6626,10 @@ void QalculateStyleSheet::scaleFont(TQFont &font, int logicalSize) const {
 	
 	int baseSize = font.pointSize();
 	
-	bool pixel = FALSE;
+	bool pixel = false;
 	if(baseSize == -1){
 		baseSize = font.pixelSize();
-		pixel = TRUE;
+		pixel = true;
 	}
 
 	float factor = baseSize;
diff --git a/src/qalculateeditdatasetdialog.cpp b/src/qalculateeditdatasetdialog.cpp
index 8ec9887..aa98420 100644
--- a/src/qalculateeditdatasetdialog.cpp
+++ b/src/qalculateeditdatasetdialog.cpp
@@ -326,9 +326,9 @@ DataSet *QalculateEditDataSetDialog::editDataSet(DataSet *ds) {
 	copyrightEdit->clear();
 	nameEdit->setReadOnly(false);
 	actionButton(Ok)->setEnabled(true);
-	newPropertyButton->setEnabled(TRUE);
-	editPropertyButton->setEnabled(FALSE);
-	deletePropertyButton->setEnabled(FALSE);
+	newPropertyButton->setEnabled(true);
+	editPropertyButton->setEnabled(false);
+	deletePropertyButton->setEnabled(false);
 	if(ds) {
 		//fill in original paramaters
 		set_name_label_and_entry(ds, nameEdit, namesLabel);
diff --git a/src/qalculateinsertfunctiondialog.cpp b/src/qalculateinsertfunctiondialog.cpp
index 0d8a048..b6be78d 100644
--- a/src/qalculateinsertfunctiondialog.cpp
+++ b/src/qalculateinsertfunctiondialog.cpp
@@ -148,7 +148,7 @@ QalculateInsertFunctionDialog::QalculateInsertFunctionDialog(MathFunction *f, TQ
 					entry[i] = bg;
 					bg->setFrameStyle(TQFrame::Plain | TQFrame::NoFrame);
 					bg->setMargin(0);
-					bg->setRadioButtonExclusive(TRUE);
+					bg->setRadioButtonExclusive(true);
 					bg->insert(new TQRadioButton(i18n("True"), bg), 1);
 					bg->insert(new TQRadioButton(i18n("False"), bg), 0);
 					TQString str = selected_text.stripWhiteSpace();