diff --git a/qt/widgets/common/src/FitPropertyBrowser.cpp b/qt/widgets/common/src/FitPropertyBrowser.cpp
index f0066cb6cac54de47b0ae74bac1344a982faf5d5..6e7d64b43387a3708f8a0921844757c56532259c 100644
--- a/qt/widgets/common/src/FitPropertyBrowser.cpp
+++ b/qt/widgets/common/src/FitPropertyBrowser.cpp
@@ -2790,8 +2790,8 @@ void FitPropertyBrowser::setupMultifit() {
           }
         }
         QString wsParam = ",WSParam=(WorkspaceIndex=" + QString::number(i);
-        wsParam += ",StartX=" + QString::number(startX()) +
-                   ",EndX=" + QString::number(endX()) + ")";
+        wsParam += ",StartX=" + QString::number(startX()) + ",EndX=" +
+                   QString::number(endX()) + ")";
         funIni += fun1Ini + ",Workspace=" + wsName + wsParam + ";";
       }
       if (!tieStr.isEmpty()) {