diff --git a/src/command/cmd.rs b/src/command/cmd.rs
index 3c9a25c..337ecda 100644
--- a/src/command/cmd.rs
+++ b/src/command/cmd.rs
@@ -69,6 +69,7 @@ struct CmdEntry {
 }
 
 /// Registry of commands constructible from text or from interactive context.
+#[derive(Default)]
 pub struct CmdRegistry {
     entries: Vec<CmdEntry>,
 }
diff --git a/src/command/keymap.rs b/src/command/keymap.rs
index 2c0424c..325429c 100644
--- a/src/command/keymap.rs
+++ b/src/command/keymap.rs
@@ -75,6 +75,7 @@ pub enum Binding {
 }
 
 /// A keymap maps key patterns to bindings (command names or prefix sub-keymaps).
+#[derive(Default)]
 pub struct Keymap {
     bindings: HashMap<KeyPattern, Binding>,
 }