1 files changed, 1 insertions, 0 deletions
diff --git a/io.c b/io.c
index 08578cf035..1b3f8c7626 100644
--- a/io.c
+++ b/io.c
@@ -7613,6 +7613,7 @@ void
 Init_IO(void)
 {
 #undef rb_intern
+#define rb_intern(str) rb_intern_const(str)
 
     VALUE rb_cARGF;
 #ifdef __CYGWIN__