diff --git a/share/completions/git.fish b/share/completions/git.fish
index 9a58efdb4..6c1f80e7e 100644
--- a/share/completions/git.fish
+++ b/share/completions/git.fish
@@ -576,7 +576,7 @@ function __fish_git_config_keys
     # Print already defined config values first
     # Config keys may span multiple lines, so parse using null char
     # With -z, key and value are separated by space, not "="
-    git config -lz | while read -lz key value
+    __fish_git config -lz | while read -lz key value
         # Print only first line of value(with an ellipsis) if multiline
         printf '%s\t%s\n' $key (string replace \n …\n -- $value)[1]
     end