diff --git a/src/MLP.h b/src/MLP.h
index 551f0fe..c9e69a3 100644
--- a/src/MLP.h
+++ b/src/MLP.h
@@ -19,7 +19,7 @@
 
 class MLP {
 public:
-  //desired call sintax :  MLP({64*64,20,4}, {"sigmoid", "linear"},
+  //desired call syntax :  MLP({64*64,20,4}, {"sigmoid", "linear"},
   MLP(const std::vector<uint64_t> & layers_nodes,
       const std::vector<std::string> & layers_activfuncs,
       bool use_constant_weight_init = false,
diff --git a/src/Sample.h b/src/Sample.h
index 449f068..4dfeebb 100644
--- a/src/Sample.h
+++ b/src/Sample.h
@@ -5,6 +5,7 @@
 #ifndef TRAININGSAMPLE_H
 #define TRAININGSAMPLE_H
 
+#include <iostream>
 #include <stdlib.h>
 #include <vector>