diff --git a/precious.toml b/precious.toml
index fe80a4c..3991109 100644
--- a/precious.toml
+++ b/precious.toml
@@ -70,7 +70,7 @@ labels = ["default", "fast-tidy"]
 [commands.omegasort-gitignore]
 type = "both"
 include = "**/.gitignore"
-cmd = ["omegasort", "--sort=path"]
+cmd = ["omegasort", "--sort=path", "--unique"]
 lint_flags = "--check"
 tidy_flags = "--in-place"
 ok_exit_codes = 0