diff --git a/libs/piqt_utils/pivariant_edit_widgets.cpp b/libs/piqt_utils/pivariant_edit_widgets.cpp
index 4188e3c..1aedea1 100644
--- a/libs/piqt_utils/pivariant_edit_widgets.cpp
+++ b/libs/piqt_utils/pivariant_edit_widgets.cpp
@@ -195,6 +195,7 @@ void PIVariantEditors::NumberBase::retranslate() {
 
 void PIVariantEditors::NumberBase::applyAttributes(const PIVariantMap & a) {
 	Type new_type = static_cast<Type>(a.value(Attribute::widgetType).toEnum().selectedValue());
+	if (new_type == tInvalid) new_type = tSpinBox;
 	if (type != new_type) {
 		type = new_type;
 		if (widget) delete widget;
@@ -215,10 +216,10 @@ void PIVariantEditors::NumberBase::applyAttributes(const PIVariantMap & a) {
 	}
 	prefix      = a.value(Attribute::prefix).toString();
 	suffix      = a.value(Attribute::suffix).toString();
-	double min  = a.value(Attribute::minimum).toDouble();
-	double max  = a.value(Attribute::maximum).toDouble();
-	double step = a.value(Attribute::singleStep).toDouble();
-	int dec     = is_int ? 0 : a.value(Attribute::decimals).toInt();
+	double min  = a.value(Attribute::minimum, -65535).toDouble();
+	double max  = a.value(Attribute::maximum, 65535).toDouble();
+	double step = a.value(Attribute::singleStep, 1.).toDouble();
+	int dec     = is_int ? 0 : a.value(Attribute::decimals, 2).toInt();
 	switch (type) {
 	case tSpinBox: {
 		auto * w = qobject_cast<QDoubleSpinBox *>(widget);