@@ -206,11 +206,12 @@
 	if (length > LONG_MAX)
 		@throw [OFOutOfRangeException exception];
 
 	if ((ret = Read(_handle, buffer, length)) < 0)
 		@throw [OFReadFailedException exceptionWithObject: self
-						  requestedLength: length];
+						  requestedLength: length
+							    errNo: EIO];
 #endif
 
 	if (ret == 0)
 		_atEndOfStream = true;
 
@@ -248,11 +249,12 @@
 	if (length > SSIZE_MAX)
 		@throw [OFOutOfRangeException exception];
 
 	if (Write(_handle, (void *)buffer, length) != (LONG)length)
 		@throw [OFWriteFailedException exceptionWithObject: self
-						   requestedLength: length];
+						   requestedLength: length
+							     errNo: EIO];
 #endif
 }
 
 #if !defined(OF_WINDOWS) && !defined(OF_MORPHOS)
 - (int)fileDescriptorForReading