1 files changed, 1 insertions, 0 deletions
diff --git a/src/rnn/cells.h b/src/rnn/cells.h
index cddfd26e..18ac4d1d 100644
--- a/src/rnn/cells.h
+++ b/src/rnn/cells.h
@@ -197,6 +197,7 @@ public:
 
 Expr gruOps(const std::vector<Expr>& nodes, bool final = false);
 
+/** Base class for a gated recurrent unit (GRU) cell. */
 class GRU : public Cell {
 protected:
   std::string prefix_;