diff --git a/include/tclap/Arg.h b/include/tclap/Arg.h
index 3ad3e77..31e8381 100644
--- a/include/tclap/Arg.h
+++ b/include/tclap/Arg.h
@@ -39,16 +39,6 @@
 
 #include <tclap/sstream.h>
 
-#if defined(HAVE_SSTREAM)
-#include <sstream>
-typedef std::istringstream istringstream;
-#elif defined(HAVE_STRSTREAM)
-#include <strstream>
-typedef std::istrstream istringstream;
-#else
-#error "Need a stringstream (sstream or strstream) to compile!"
-#endif
-
 #include <tclap/ArgException.h>
 #include <tclap/Visitor.h>
 #include <tclap/CmdLineInterface.h>
diff --git a/include/tclap/ValuesConstraint.h b/include/tclap/ValuesConstraint.h
index d1c1df7..cff90be 100644
--- a/include/tclap/ValuesConstraint.h
+++ b/include/tclap/ValuesConstraint.h
@@ -93,15 +93,7 @@ ValuesConstraint<T>::ValuesConstraint(std::vector<T>& allowed)
 { 
     for ( unsigned int i = 0; i < _allowed.size(); i++ )
     {
-
-#if defined(HAVE_SSTREAM)
         std::ostringstream os;
-#elif defined(HAVE_STRSTREAM)
-        std::ostrstream os;
-#else
-#error "Need a stringstream (sstream or strstream) to compile!"
-#endif
-
         os << _allowed[i];
 
         std::string temp( os.str() );