1 files changed, 1 insertions, 0 deletions
diff --git a/io.c b/io.c
index 980f8232bf..e50d0d07a0 100644
--- a/io.c
+++ b/io.c
@@ -7276,6 +7276,7 @@ rb_f_p(int argc, VALUE *argv, VALUE self)
  *
  *     def display(port=$>)
  *       port.write self
+ *       nil
  *     end
  *
  *  For example: