diff --git a/showdown/engine/special_effects/moves/modify_move.py b/showdown/engine/special_effects/moves/modify_move.py
index 86931e82..59c6330c 100644
--- a/showdown/engine/special_effects/moves/modify_move.py
+++ b/showdown/engine/special_effects/moves/modify_move.py
@@ -368,7 +368,7 @@ def terablast(attacking_side, attacking_move, defending_move, attacking_pokemon,
 
         boosted_stats = attacking_pokemon.calculate_boosted_stats()
 
-        if boosted_stats[constants.SPECIAL_ATTACK] > boosted_stats[constants.ATTACK]:
+        if boosted_stats[constants.ATTACK] > boosted_stats[constants.SPECIAL_ATTACK]:
             attacking_move[constants.CATEGORY] = constants.PHYSICAL
 
     return attacking_move