diff --git a/cpp/src/datetime/datetime_ops.cu b/cpp/src/datetime/datetime_ops.cu
index b1b504681a0..914f9484056 100644
--- a/cpp/src/datetime/datetime_ops.cu
+++ b/cpp/src/datetime/datetime_ops.cu
@@ -107,6 +107,8 @@ struct ceil_timestamp {
         return time_point_cast<typename Timestamp::duration>(ceil<duration_ns>(ts));
       default: cudf_assert(false && "Unexpected resolution");
     }
+
+    return {};
   }
 };