diff --git a/src/write.rs b/src/write.rs
index 9e9571a5..8f55cd72 100644
--- a/src/write.rs
+++ b/src/write.rs
@@ -173,7 +173,7 @@ impl arbitrary::Arbitrary<'_> for FileOptions {
                     let level = u.int_in_range(0..=265)?;
                     options.compression_level = Some(level);
                     #[cfg(feature = "deflate-zopfli")]
-                    if level > Compression::best().level() {
+                    if level > Compression::best().level().try_into().unwrap() {
                         options.zopfli_buffer_size = Some(1 << u.int_in_range(9..=30)?);
                     }
                 }