diff --git a/lib/src/showcase.dart b/lib/src/showcase.dart
index 1779f98b..3bec390e 100644
--- a/lib/src/showcase.dart
+++ b/lib/src/showcase.dart
@@ -337,10 +337,10 @@ class Showcase extends StatefulWidget {
     this.disableDefaultTargetGestures = false,
     this.tooltipPosition,
     this.onBarrierClick,
+    this.onToolTipClick,
     this.disableBarrierInteraction = false,
     this.toolTipSlideEndDistance = 7,
   })  : showArrow = false,
-        onToolTipClick = null,
         scaleAnimationDuration = const Duration(milliseconds: 300),
         scaleAnimationCurve = Curves.decelerate,
         scaleAnimationAlignment = null,