diff --git a/src/main.rs b/src/main.rs
index c22bbce..e4e9610 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -61,7 +61,7 @@ fn main() -> Result<(), std::io::Error> {
             Err(task::MissingTask(t)) => {
                 // Temporarily override the global context
                 let mut context = context.clone();
-                context.insert("$i18n_task".to_string(), t);
+                context.insert("$i18n_arg".to_string(), t);
                 log::error("unknown_arg", &context);
                 std::process::exit(1);
             }