diff --git a/init/completions/function.fish b/init/completions/function.fish
index 54674b2d0..25194511b 100644
--- a/init/completions/function.fish
+++ b/init/completions/function.fish
@@ -5,3 +5,4 @@ complete -c function -s j -l on-job-exit -d (_ "Make the function a job exit eve
 complete -c function -s p -l on-process-exit -d (_ "Make the function a process exit event handler") -x
 complete -c function -s s -l on-signal -d (_ "Make the function a signal event handler") -x
 complete -c function -s v -l on-variable -d (_ "Make the function a variable update event handler") -x
+complete -c function -s b -l key-binding -d (_ "Allow dash (-) in function name")