diff --git a/mlkem/native/arith_native.h b/mlkem/native/arith_native.h
index aad3565b6..b7e921323 100644
--- a/mlkem/native/arith_native.h
+++ b/mlkem/native/arith_native.h
@@ -240,7 +240,7 @@ static INLINE void poly_frombytes_native(poly *a,
  *
  * Return -1 if the native implementation does not support the input lengths.
  * Otherwise, returns non-negative number of sampled 16-bit integers (at most
- *len).
+ * len).
  **************************************************/
 static INLINE int rej_uniform_native(int16_t *r, unsigned int len,
                                      const uint8_t *buf, unsigned int buflen);
diff --git a/mlkem/native/x86_64/arith_native_x86_64.h b/mlkem/native/x86_64/arith_native_x86_64.h
index ca7a0027b..b346e1eb2 100644
--- a/mlkem/native/x86_64/arith_native_x86_64.h
+++ b/mlkem/native/x86_64/arith_native_x86_64.h
@@ -20,7 +20,6 @@
   ((12 * MLKEM_N / 8 * (1 << 12) / MLKEM_Q + SHAKE128_RATE) / SHAKE128_RATE)
 #define REJ_UNIFORM_AVX_BUFLEN (REJ_UNIFORM_AVX_NBLOCKS * SHAKE128_RATE)
 
-/* TODO: Document buffer constraints */
 #define rej_uniform_avx2 MLKEM_NAMESPACE(rej_uniform_avx2)
 unsigned int rej_uniform_avx2(int16_t *r, const uint8_t *buf);