diff --git a/qucs/qucs/dialogs/sweepdialog.cpp b/qucs/qucs/dialogs/sweepdialog.cpp
index 4dd940e2d4..b73d9e1cd0 100644
--- a/qucs/qucs/dialogs/sweepdialog.cpp
+++ b/qucs/qucs/dialogs/sweepdialog.cpp
@@ -117,7 +117,7 @@ SweepDialog::~SweepDialog()
 {
   delete pGraph;
 
-  while(!ValueList.isEmpty()) {
+  while (!ValueList.isEmpty()) {
     delete ValueList.takeFirst();
   }
 }