diff --git a/examples/test11.cpp b/examples/test11.cpp
index f7d06fe..71ae4ac 100644
--- a/examples/test11.cpp
+++ b/examples/test11.cpp
@@ -1,6 +1,8 @@
 #include "tclap/CmdLine.h"
 #include <iterator>
 
+#include <sstream>
+
 using namespace TCLAP;
 
 // Define a simple 3D vector type
diff --git a/examples/test12.cpp b/examples/test12.cpp
index 21016ea..20447a7 100644
--- a/examples/test12.cpp
+++ b/examples/test12.cpp
@@ -2,6 +2,8 @@
 #include <iterator>
 #include <algorithm>
 
+#include <sstream>
+
 using namespace TCLAP;
 
 // Define a simple 3D vector type
diff --git a/examples/test14.cpp b/examples/test14.cpp
index e194845..c33e5c0 100644
--- a/examples/test14.cpp
+++ b/examples/test14.cpp
@@ -2,6 +2,8 @@
 #include <iterator>
 #include <algorithm>
 
+#include <sstream>
+
 // Define a simple 3D vector type
 template<typename T, size_t LEN>
 struct Vect : public TCLAP::StringLikeTrait {
diff --git a/examples/test15.cpp b/examples/test15.cpp
index 62cd95b..ec9dc11 100644
--- a/examples/test15.cpp
+++ b/examples/test15.cpp
@@ -2,6 +2,8 @@
 #include <iterator>
 #include <algorithm>
 
+#include <sstream>
+
 // Define a simple 3D vector type
 template<typename T, size_t LEN>
 struct Vect {
diff --git a/examples/test16.cpp b/examples/test16.cpp
index fae185c..d0c9dab 100644
--- a/examples/test16.cpp
+++ b/examples/test16.cpp
@@ -2,6 +2,8 @@
 #include <iterator>
 #include <algorithm>
 
+#include <sstream>
+
 namespace TCLAP {
     template<>
     struct ArgTraits< std::vector<double> > {