diff --git a/OriginAnyParser.cpp b/OriginAnyParser.cpp
index 05bfb95..dd5dd9b 100644
--- a/OriginAnyParser.cpp
+++ b/OriginAnyParser.cpp
@@ -22,6 +22,7 @@
 #include "OriginAnyParser.h"
 #include <sstream>
 #include <cinttypes>
+#include <iostream>
 
 /* define a macro to get an int (or uint) from a istringstream in binary mode */
 #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
diff --git a/opj2dat.cpp b/opj2dat.cpp
index 4b8d57a..5a31b4e 100644
--- a/opj2dat.cpp
+++ b/opj2dat.cpp
@@ -31,6 +31,7 @@
 #include <cmath>
 #include <fstream>
 #include <sstream>
+#include <iostream>
 #include <string>
 
 using namespace std;