diff --git a/vm/src/stdlib/math.rs b/vm/src/stdlib/math.rs
index 46bf7ca18..e934b53b6 100644
--- a/vm/src/stdlib/math.rs
+++ b/vm/src/stdlib/math.rs
@@ -453,11 +453,11 @@ fn math_fsum(iter: PyIterable<IntoPyFloat>, vm: &VirtualMachine) -> PyResult<f64
             let y = lo + lo;
             let x = hi + y;
 
-            /* Make half-even rounding work across multiple partials.
-               Needed so that sum([1e-16, 1, 1e16]) will round-up the last
-               digit to two instead of down to zero (the 1e-16 makes the 1
-               slightly closer to two).  With a potential 1 ULP rounding
-               error fixed-up, math.fsum() can guarantee commutativity. */
+            // Make half-even rounding work across multiple partials.
+            // Needed so that sum([1e-16, 1, 1e16]) will round-up the last
+            // digit to two instead of down to zero (the 1e-16 makes the 1
+            // slightly closer to two).  With a potential 1 ULP rounding
+            // error fixed-up, math.fsum() can guarantee commutativity.
             #[allow(clippy::float_cmp)]
             if y == x - hi {
                 hi = x;