diff --git a/doc/users/prev_whats_new/whats_new_1.5.rst b/doc/users/prev_whats_new/whats_new_1.5.rst
index 9e7ca186252b..38d0838d2f78 100644
--- a/doc/users/prev_whats_new/whats_new_1.5.rst
+++ b/doc/users/prev_whats_new/whats_new_1.5.rst
@@ -37,6 +37,7 @@ The upshot of this is that for interactive backends (including
 ``%matplotlib notebook``) in interactive mode (with ``plt.ion()``)
 
 .. ipython :: python
+   :okwarning:
 
    import matplotlib.pyplot as plt