diff --git a/plonky2x/src/frontend/num/nonnative/nonnative.rs b/plonky2x/src/frontend/num/nonnative/nonnative.rs
index c984dfcf7..8a370e814 100644
--- a/plonky2x/src/frontend/num/nonnative/nonnative.rs
+++ b/plonky2x/src/frontend/num/nonnative/nonnative.rs
@@ -57,7 +57,6 @@ impl<FF: PrimeField> CircuitVariable for NonNativeTarget<FF> {
                 .constants
                 .insert(*variable, L::Field::from_canonical_u32(big_int_rep[i]));
         }
-        builder.constants.insert(target, value);
         return target;
     }