diff --git a/src/ArgParser.cc b/src/ArgParser.cc
index 691c27d..2a7903e 100644
--- a/src/ArgParser.cc
+++ b/src/ArgParser.cc
@@ -5,12 +5,12 @@
  * 2012.09.10
  */
 
-#include <getopt.h>
 #include <iostream>
-#include <vector>
 #include <unordered_map>
 #include <cassert>
 
+#include <getopt.h>
+
 #include "ArgParser.h"
 
 namespace pdf2htmlEX {
diff --git a/src/HTMLTextLine.h b/src/HTMLTextLine.h
index 107b9a9..ac2a0f5 100644
--- a/src/HTMLTextLine.h
+++ b/src/HTMLTextLine.h
@@ -5,7 +5,7 @@
 #ifndef HTMLTEXTLINE_H__
 #define HTMLTEXTLINE_H__
 
-#include <iostream>
+#include <ostream>
 #include <vector>
 
 #include <CharTypes.h>