diff --git a/share/completions/complete.fish b/share/completions/complete.fish
index a6c5e6c58..65ac56fa1 100644
--- a/share/completions/complete.fish
+++ b/share/completions/complete.fish
@@ -2,7 +2,7 @@
 
 complete -c complete -s c -l command -d "Command to add completion to" -r
 complete -c complete -s p -l path -d "Path to add completion to"
-complete -c complete -s s -l short-option -d "Posix-style option to complete"
+complete -c complete -s s -l short-option -d "POSIX-style option to complete"
 complete -c complete -s l -l long-option -d "GNU-style option to complete"
 complete -c complete -s o -l old-option -d "Old style long option to complete"
 complete -c complete -s f -l no-files -d "Do not use file completion"