diff --git a/cpp/src/io/orc/stripe_data.cu b/cpp/src/io/orc/stripe_data.cu
index fbcc1781f3a..e3d40c674bb 100644
--- a/cpp/src/io/orc/stripe_data.cu
+++ b/cpp/src/io/orc/stripe_data.cu
@@ -186,6 +186,7 @@ class run_cache {
    * greater than it.
    *
    * @param max_length The maximum length allowed to be consumed.
+   * @return A new maximum length.
    */
   __forceinline__ __device__ uint32_t adjust_max_length(uint32_t max_length)
   {