diff --git a/source/RnnStack.cpp b/source/RnnStack.cpp
index 4550a8f..ceb4b33 100644
--- a/source/RnnStack.cpp
+++ b/source/RnnStack.cpp
@@ -12,6 +12,7 @@
  */
 
 #include "RnnStack.hpp"
+#include "RnnTextHelper.hpp"
 
 RnnStack::RnnStack(const std::string &name, size_t numContext)
 : AStack(StackType::Rnn, name)
@@ -98,7 +99,7 @@ arma::mat RnnStack::step_forward(arma::mat &state, const arma::mat& v_curr)
 	{
 		int k = getSeqLen()- j - 1;
 		Layer *pLayer = getLayer(j);
-		arma::mat v = arma::join_rows(state.row(k), z);
+		arma::mat v = arma::join_rows(z, state.row(k));
 		arma::mat vc = v_to_vc(v, c);
 		pLayer->gibbs_vh(vc, c);