diff --git a/core/src/game.rs b/core/src/game.rs
index a729d4d0..de968301 100644
--- a/core/src/game.rs
+++ b/core/src/game.rs
@@ -336,7 +336,11 @@ impl Game {
 
 
     pub fn clear_skill(&mut self, player_id: Uuid) -> Result<&mut Game, Error> {
-        self.player_by_id(player_id)?;
+        let player = self.player_by_id(player_id)?;
+        if player.ready {
+            return Err(err_msg("cannot clear skills while ready"));
+        }
+
         if self.phase != Phase::Skill {
             return Err(err_msg("game not in skill phase"));
         }
@@ -2058,7 +2062,7 @@ mod tests {
         let resolutions = &game.resolutions[last];
 
         assert!(resolutions.iter().any(|r| match r.event {
-            Event::Damage { construct, colour, amount, mitigation: _, display: _ } => 
+            Event::Damage { construct, colour, amount, mitigation: _, display: _ } =>
                 construct == target && amount == 320.pct(50) && colour == Colour::Blue,
             _ => false,
         }));