diff --git a/src/primitives/decode.rs b/src/primitives/decode.rs
index 7b0f321f..65085ac3 100644
--- a/src/primitives/decode.rs
+++ b/src/primitives/decode.rs
@@ -444,7 +444,7 @@ impl<'s> CheckedHrpstring<'s> {
     ///
     /// Converts the ASCII bytes representing field elements to the respective field elements.
     #[inline]
-    pub fn fe32_iter(&self, _: u8) -> AsciiToFe32Iter {
+    pub fn fe32_iter(&self) -> AsciiToFe32Iter {
         AsciiToFe32Iter { iter: self.ascii.iter().copied() }
     }