diff --git a/include/rapidjson/istreamwrapper.h b/include/rapidjson/istreamwrapper.h
index f304fb0..c4950b9 100644
--- a/include/rapidjson/istreamwrapper.h
+++ b/include/rapidjson/istreamwrapper.h
@@ -17,6 +17,7 @@
 
 #include "stream.h"
 #include <iosfwd>
+#include <ios>
 
 #ifdef __clang__
 RAPIDJSON_DIAG_PUSH