diff --git a/include/caffe/data_transformer.hpp b/include/caffe/data_transformer.hpp
index 302bf70e..5d5134f5 100644
--- a/include/caffe/data_transformer.hpp
+++ b/include/caffe/data_transformer.hpp
@@ -31,7 +31,7 @@ class DataTransformer {
    * @param datum
    *    Datum containing the data to be transformed.
    * @param mean
-   * @param top_data
+   * @param transformed_data
    *    This is meant to be the top blob's data. The transformed data will be
    *    written at the appropriate place within the blob's data.
    */