diff --git a/src/ShuttleGui.h b/src/ShuttleGui.h
index df2425e4f..22799480c 100644
--- a/src/ShuttleGui.h
+++ b/src/ShuttleGui.h
@@ -63,6 +63,7 @@ class wxMenuBar;
 class wxMenu;
 class wxSpinCtrl;
 class wxListBox;
+class wxGrid;
 class Shuttle;
 
 class WrappedType;