diff --git a/math/src/ring/impl_u64/packing.rs b/math/src/ring/impl_u64/packing.rs
index 4f62c22..3c5b772 100644
--- a/math/src/ring/impl_u64/packing.rs
+++ b/math/src/ring/impl_u64/packing.rs
@@ -55,7 +55,7 @@ impl Ring<u64> {
 
         // Retrives non-empty indexes
         polys.iter().enumerate().for_each(|(i, poly)| {
-            if Some(poly) != None {
+            if !poly.is_none() {
                 indices.push(i);
             }
         });