diff --git a/examples/p-to-n-examples/op-test-adi.cir b/examples/p-to-n-examples/op-test-adi.cir
index a82eca9aa..cdde2ccf6 100644
--- a/examples/p-to-n-examples/op-test-adi.cir
+++ b/examples/p-to-n-examples/op-test-adi.cir
@@ -30,6 +30,7 @@ vin in 0 DC 0 PULSE(0.1 0.2 200uS 200uS 200uS 5m 10m)
 .tran 10u 10m
 
 .control
+option sparse ; KLU will fail
 run
 plot dc1.v(outo) vs dc1.v(in)
 plot v(in)  v(a1) v(outo)