diff --git a/gfx/progress.lua b/gfx/progress.lua
index 00969df..06fc2cb 100644
--- a/gfx/progress.lua
+++ b/gfx/progress.lua
@@ -77,6 +77,12 @@ function Progress:_isDirty()
   return Element._isDirty(self) or self.active:_isDirty() or self.inactive:_isDirty()
 end
 
+function Progress:setDirty(fullInvalidate)
+  Element.setDirty(self, fullInvalidate)
+  self.active:setDirty(self, fullInvalidate)
+  self.inactive:setDirty(self, fullInvalidate)
+end
+
 function Progress:_reload()
   Element._reload(self)