diff --git a/codex-rs/config/src/tui_keymap.rs b/codex-rs/config/src/tui_keymap.rs
index 3e8be83d6..90d82da93 100644
--- a/codex-rs/config/src/tui_keymap.rs
+++ b/codex-rs/config/src/tui_keymap.rs
@@ -494,6 +494,7 @@ fn normalize_key_name(key: &str, original: &str) -> Result<String, String> {
             | "page-up"
             | "page-down"
             | "space"
+            | "minus"
     ) {
         return Ok(alias.to_string());
     }
@@ -508,7 +509,7 @@ fn normalize_key_name(key: &str, original: &str) -> Result<String, String> {
     Err(format!(
         "unknown key `{key}` in keybinding `{original}`. \
 Use a printable character (for example `a`), function keys (`f1`-`f12`), \
-or one of: enter, tab, backspace, esc, delete, arrows, home/end, page-up/page-down, space.\n\
+or one of: enter, tab, backspace, esc, delete, arrows, home/end, page-up/page-down, space, minus.\n\
 See the Codex keymap documentation for supported actions and examples."
     ))
 }
@@ -516,6 +517,7 @@ See the Codex keymap documentation for supported actions and examples."
 #[cfg(test)]
 mod tests {
     use super::*;
+    use pretty_assertions::assert_eq;
 
     #[test]
     fn misplaced_action_at_keymap_root_is_rejected() {
@@ -581,4 +583,30 @@ mod tests {
         let keymap: TuiKeymap = toml::from_str(toml_input).expect("valid config");
         assert!(keymap.global.open_transcript.is_some());
     }
+
+    #[test]
+    fn minus_bindings_under_global_context_are_accepted() {
+        for (spec, expected) in [
+            (
+                "minus",
+                KeybindingsSpec::One(KeybindingSpec("minus".to_string())),
+            ),
+            (
+                "alt-minus",
+                KeybindingsSpec::One(KeybindingSpec("alt-minus".to_string())),
+            ),
+        ] {
+            let toml_input = format!(
+                r#"
+                [global]
+                open_transcript = "{spec}"
+                "#
+            );
+            let keymap: TuiKeymap = toml::from_str(&toml_input).expect("valid config");
+            let mut expected_keymap = TuiKeymap::default();
+            expected_keymap.global.open_transcript = Some(expected);
+
+            assert_eq!(keymap, expected_keymap);
+        }
+    }
 }