diff --git a/src/sorting/smooth_sort.rs b/src/sorting/smooth_sort.rs
index a3346c3443d..a367a74c93c 100644
--- a/src/sorting/smooth_sort.rs
+++ b/src/sorting/smooth_sort.rs
@@ -57,8 +57,8 @@ fn heapify_leonardo(nums: &mut [i32], index: usize, sizes: &[usize], mut heaps:
             break;
         }
 
-        let left_child = current.saturating_sub(heap_size);
-        let right_child = current.saturating_sub(1);
+        let left_child = if current >= heap_size { current - heap_size } else { break };
+        let right_child = if current > 0 { current - 1 } else { break };
 
         if nums[current] < nums[left_child] {
             nums.swap(current, left_child);
@@ -71,7 +71,7 @@ fn heapify_leonardo(nums: &mut [i32], index: usize, sizes: &[usize], mut heaps:
         }
 
         heaps -= 1;
-        heap_size = heap_size.saturating_sub(1);
+        heap_size = sizes[heaps];
     }
 }