diff --git a/docs/examples/abstract/demo.v b/docs/examples/abstract/demo.v
index 9e5ed2b..a19150f 100644
--- a/docs/examples/abstract/demo.v
+++ b/docs/examples/abstract/demo.v
@@ -9,7 +9,7 @@ module demo (
 		if (reset)
 			counter <= 0;
 		else
-			counter <= counter + 1;
+			counter <= counter + 20'd 1;
 	end
 
 	assign A = counter == 123456;