diff --git a/ui/qt/widgets/interface_toolbar_lineedit.cpp b/ui/qt/widgets/interface_toolbar_lineedit.cpp
index b8ed7bd337..76c1bc5bb2 100644
--- a/ui/qt/widgets/interface_toolbar_lineedit.cpp
+++ b/ui/qt/widgets/interface_toolbar_lineedit.cpp
@@ -33,7 +33,7 @@
 
 InterfaceToolbarLineEdit::InterfaceToolbarLineEdit(QWidget *parent, QString validation_regex, bool is_required) :
     QLineEdit(parent),
-    validation_regex_(validation_regex),
+    regex_expr_(validation_regex),
     is_required_(is_required),
     text_edited_(false)
 {
@@ -95,10 +95,9 @@ bool InterfaceToolbarLineEdit::isValid()
         valid = false;
     }
 
-    if (!validation_regex_.isEmpty() && text().length() > 0)
+    if (!regex_expr_.isEmpty() && text().length() > 0)
     {
-        QRegExp expr(validation_regex_);
-        if (!expr.isValid() || expr.indexIn(text(), 0) == -1)
+        if (!regex_expr_.isValid() || regex_expr_.indexIn(text(), 0) == -1)
         {
             valid = false;
         }
diff --git a/ui/qt/widgets/interface_toolbar_lineedit.h b/ui/qt/widgets/interface_toolbar_lineedit.h
index e26a50c976..5e7736b049 100644
--- a/ui/qt/widgets/interface_toolbar_lineedit.h
+++ b/ui/qt/widgets/interface_toolbar_lineedit.h
@@ -50,7 +50,7 @@ private:
     void updateStyleSheet(bool is_valid);
 
     StockIconToolButton *apply_button_;
-    QString validation_regex_;
+    QRegExp regex_expr_;
     bool is_required_;
     bool text_edited_;
 };