1 files changed, 1 insertions, 1 deletions

diff --git a/io.c b/io.c
index 5abe8dd5c8..2b459ca1aa 100644
--- a/io.c
+++ b/io.c
@@ -2389,7 +2389,7 @@ rb_io_mode_flags(mode)
     return flags;
 }
 
-static int
+int
 rb_io_modenum_flags(mode)
     int mode;
 {