diff --git a/IOStreams/IStreamable.h b/IOStreams/IStreamable.h
index 018774f..f80f449 100644
--- a/IOStreams/IStreamable.h
+++ b/IOStreams/IStreamable.h
@@ -29,6 +29,10 @@ namespace Alepha::Hydrogen::IOStreams  ::detail::  IStreamable_m
 	std::istream &
 	operator >> ( std::istream &is, IStreamableAggregate auto &istreamable )
 	{
+		std::istream::sentry sentry{ is };
+
+		if( not sentry ) return is;
+
 		std::string line;
 		std::getline( is, line );
 		const auto commentChar= line.find( "#" );