diff --git a/av1an-core/src/context.rs b/av1an-core/src/context.rs
index 0084c207..966e0f18 100644
--- a/av1an-core/src/context.rs
+++ b/av1an-core/src/context.rs
@@ -383,7 +383,7 @@ impl Av1anContext {
         });
 
         if self.args.vmaf {
-          let vmaf_threads = available_parallelism().map_or(1, |p| p.get());
+          let vmaf_threads = available_parallelism().map_or(1, std::num::NonZero::get);
 
           if let Err(e) = vmaf::plot(
             self.args.output_file.as_ref(),