--- kcalc-15.12.3/kcalc.cpp.orig	2016-03-16 16:26:37.327157522 +0000
+++ kcalc-15.12.3/kcalc.cpp	2016-03-16 16:28:08.533357025 +0000
@@ -123,7 +123,7 @@
 
 	updateGeometry();
 
-	setFixedSize(minimumSize());
+	if ( ! minimumSize().isEmpty() ) setFixedSize(minimumSize());
 
 	updateDisplay(UPDATE_FROM_CORE);