diff --git a/src/qt/qvalidatedlineedit.h b/src/qt/qvalidatedlineedit.h
--- a/src/qt/qvalidatedlineedit.h
+++ b/src/qt/qvalidatedlineedit.h
@@ -23,6 +23,7 @@
 protected:
     void focusInEvent(QFocusEvent *evt) override;
     void focusOutEvent(QFocusEvent *evt) override;
+    void keyPressEvent(QKeyEvent *evt) override;
 
 private:
     bool valid;
diff --git a/src/qt/qvalidatedlineedit.cpp b/src/qt/qvalidatedlineedit.cpp
--- a/src/qt/qvalidatedlineedit.cpp
+++ b/src/qt/qvalidatedlineedit.cpp
@@ -39,6 +39,13 @@
     QLineEdit::focusOutEvent(evt);
 }
 
+void QValidatedLineEdit::keyPressEvent(QKeyEvent *evt) {
+    // Forward the key press first so we validate the resulting content
+    QLineEdit::keyPressEvent(evt);
+
+    checkValidity();
+}
+
 void QValidatedLineEdit::markValid() {
     // As long as a user is typing ensure we display state as valid
     setValid(true);