1 files changed, 1 insertions, 0 deletions
diff --git a/rubyio.h b/rubyio.h
index 014ca4acd7..b0d9cda3ec 100644
--- a/rubyio.h
+++ b/rubyio.h
@@ -58,5 +58,6 @@ void rb_io_synchronized _((OpenFile*));
 void rb_io_check_closed _((OpenFile*));
 void rb_eof_error _((void));
 
+void rb_read_check _((FILE*));
 int rb_read_pending _((FILE*));
 #endif