diff --git a/lib/bcdice/game_system/StellarKnights.rb b/lib/bcdice/game_system/StellarKnights.rb
index 5019a92d0..cef822fcc 100644
--- a/lib/bcdice/game_system/StellarKnights.rb
+++ b/lib/bcdice/game_system/StellarKnights.rb
@@ -79,7 +79,7 @@ def eval_game_system_specific_command(command)
         if (table = self.class::TABLES[command])
           table.roll(@randomizer)
         elsif (m = %r{([()+/\d]+)SK(\d)?((,\d>\d)+)?}.match(command))
-          num_dices = Arithmetic.eval(m[1], round_type: RoundType::FLOOR)
+          num_dices = Arithmetic.eval(m[1], RoundType::FLOOR)
 
           unless num_dices.nil?
             resolute_action(num_dices, m[2] && m[2].to_i, m[3])