1 files changed, 1 insertions, 1 deletions
diff --git a/io.c b/io.c
index 217066b04..3ce2d2a21 100644
--- a/io.c
+++ b/io.c
@@ -1262,7 +1262,7 @@ rb_io_pid(VALUE io)
     GetOpenFile(io, fptr);
     if (!fptr->pid)
 	return Qnil;
-    return INT2FIX(fptr->pid);
+    return PIDT2NUM(fptr->pid);
 }