diff --git a/include/tclap/MultiArg.h b/include/tclap/MultiArg.h
index d3f176d..53346a3 100644
--- a/include/tclap/MultiArg.h
+++ b/include/tclap/MultiArg.h
@@ -26,14 +26,19 @@
 #include <string>
 #include <vector>
 
+#include <tclap/Arg.h>
+
+#ifdef HAVE_CONFIG_H
 #include <config.h>
-#ifdef HAVE_SSTREAM
-#include <sstream>
-#elif HAVE_SSTREAM
-#include <strstream>
+#else
+#define HAVE_SSTREAM
 #endif
 
-#include <tclap/Arg.h>
+#if defined(HAVE_SSTREAM)
+#include <sstream>
+#elif defined(HAVE_STRSTREAM)
+#include <strstream>
+#endif
 
 namespace TCLAP {
 
diff --git a/include/tclap/ValueArg.h b/include/tclap/ValueArg.h
index fc3a9f9..744f1db 100644
--- a/include/tclap/ValueArg.h
+++ b/include/tclap/ValueArg.h
@@ -26,15 +26,20 @@
 #include <string>
 #include <vector>
 
+#include <tclap/Arg.h>
+
+#ifdef HAVE_CONFIG_H
 #include <config.h>
+#else
+#define HAVE_SSTREAM
+#endif
+
 #if defined(HAVE_SSTREAM)
 #include <sstream>
 #elif defined(HAVE_STRSTREAM)
 #include <strstream>
 #endif
 
-#include <tclap/Arg.h>
-
 namespace TCLAP {
 
 template<class T> class ValueArg;