diff --git a/lib/matplotlib/backends/backend_nbagg.py b/lib/matplotlib/backends/backend_nbagg.py
index cba19ea6d7cc..3f5ad553ad2e 100644
--- a/lib/matplotlib/backends/backend_nbagg.py
+++ b/lib/matplotlib/backends/backend_nbagg.py
@@ -258,7 +258,8 @@ def trigger_manager_draw(manager):
         manager.show()
 
     @staticmethod
-    def show():
+    def show(*args, **kwargs):
+        ## TODO: something to do when keyword block==False ?
         from matplotlib._pylab_helpers import Gcf
 
         managers = Gcf.get_all_fig_managers()