diff --git a/share/completions/git.fish b/share/completions/git.fish
index df6d045dc..b39ae124b 100644
--- a/share/completions/git.fish
+++ b/share/completions/git.fish
@@ -243,4 +243,4 @@ complete -f -c git -n '__fish_git_using_command submodule' -a 'add status init u
 complete -f -c git -n '__fish_git_needs_command' -a whatchanged -d 'Show logs with difference each commit introduces'
 
 ## Aliases (custom user-defined commands)
-complete -c git -n '__fish_git_needs_command' -a '(git config --get-regexp alias | sed -e "s/^alias\.\(\S\+\).*/\1/")' -d 'Alias (user-defined command)'
+complete -c git -n '__fish_git_needs_command' -a '(git config --get-regexp alias | sed "s/^alias\.\([^ ]*\).*/\1/")' -d 'Alias (user-defined command)'