diff --git a/helix-term/src/commands/typed.rs b/helix-term/src/commands/typed.rs
index e1c09a04d..4e912127c 100644
--- a/helix-term/src/commands/typed.rs
+++ b/helix-term/src/commands/typed.rs
@@ -2924,7 +2924,7 @@ pub const TYPABLE_COMMAND_LIST: &[TypableCommand] = &[
         fun: theme,
         completer: CommandCompleter::positional(&[completers::theme]),
         signature: Signature {
-            positionals: (1, Some(1)),
+            positionals: (0, Some(1)),
             ..Signature::DEFAULT
         },
     },