diff -up kcalc-15.12.3/kcalc.cpp kcalc-15.12.3/kcalc.cpp
--- kcalc-15.12.3/kcalc.cpp 2016-03-09 17:12:50.000000000 -0600
+++ kcalc-15.12.3/kcalc.cpp 2016-03-16 08:18:05.635713639 -0500
@@ -124,5 +124,5 @@ KCalculator::KCalculator(QWidget *parent
	updateGeometry();

-	setFixedSize(minimumSize());
+	if ( ! minimumSize().isEmpty() ) setFixedSize(minimumSize());

	updateDisplay(UPDATE_FROM_CORE);