diff --git a/src/uint/bits.rs b/src/uint/bits.rs
index 9e6c1d71..da514058 100644
--- a/src/uint/bits.rs
+++ b/src/uint/bits.rs
@@ -2,6 +2,9 @@ use crate::{CtChoice, Limb, Uint, Word};
 
 impl<const LIMBS: usize> Uint<LIMBS> {
     /// Returns `true` if the bit at position `index` is set, `false` otherwise.
+    ///
+    /// # Remarks
+    /// This operation is variable time with respect to `index` only.
     #[inline(always)]
     pub const fn bit_vartime(&self, index: usize) -> bool {
         if index >= Self::BITS {