diff --git a/numerics/sin_cos.cpp b/numerics/sin_cos.cpp
index 90af3e5ae1..04f81d24ac 100644
--- a/numerics/sin_cos.cpp
+++ b/numerics/sin_cos.cpp
@@ -171,8 +171,8 @@ inline void Reduce(Argument const θ,
         FusedMultiplyAdd<fma_policy>(abs_θ, (2 / π), mantissa_reduce_shifter) -
         mantissa_reduce_shifter;
 
-    // Don't move the computation of `n` before the loop, it generates some
-    // extra moves.
+    // Don't move the computation of `n` after the if, it generates some extra
+    // moves.
     Argument value;
     std::int64_t n;
     if constexpr (preserve_sign) {