diff --git a/fuzz/fuzz_targets/opt_diff.rs b/fuzz/fuzz_targets/opt_diff.rs
index d910e17..dc25d7d 100644
--- a/fuzz/fuzz_targets/opt_diff.rs
+++ b/fuzz/fuzz_targets/opt_diff.rs
@@ -48,7 +48,7 @@ fuzz_target!(
         }
 
         let mut opt_module = parsed_module.clone();
-        opt_module.per_func_body(|body| body.optimize());
+        opt_module.per_func_body(|body| body.optimize(&mut waffle::Fuel::infinite()));
         opt_module.per_func_body(|body| body.convert_to_max_ssa());
 
         let mut opt_ctx = InterpContext::new(&opt_module).unwrap();