diff --git a/src/tree/updater.h b/src/tree/updater.h
index 49adc8dca..4ced21e5e 100644
--- a/src/tree/updater.h
+++ b/src/tree/updater.h
@@ -28,7 +28,7 @@ class IUpdater {
    * \param gpair the gradient pair statistics of the data
    * \param p_fmat feature matrix that provide access to features
    * \param info extra side information that may be need, such as root index
-   * \param trees pointer to the trese to be updated, upater will change the content of the tree
+   * \param trees pointer to the trees to be updated, upater will change the content of the tree
    *   note: all the trees in the vector are updated, with the same statistics, 
    *         but maybe different random seeds, usually one tree is passed in at a time, 
    *         there can be multiple trees when we train random forest style model