--- include/iconv.h.in.orig	2013-07-29 16:05:19.000000000 -0500
+++ include/iconv.h.in	2013-07-29 16:10:13.000000000 -0500
@@ -112,6 +112,7 @@
 #endif
 
 #ifdef __cplusplus
+#include <cwchar>	// for std::mbstate_t
 extern "C" {
 #endif