diff --git a/helix-term/src/ui/mod.rs b/helix-term/src/ui/mod.rs
index 113bc486..560e9155 100644
--- a/helix-term/src/ui/mod.rs
+++ b/helix-term/src/ui/mod.rs
@@ -260,6 +260,7 @@ pub mod completers {
         names.push("default".into());
         names.push("base16_default".into());
         names.sort();
+        names.dedup();
 
         let mut names: Vec<_> = names
             .into_iter()