diff --git a/src/server/game/AI/CreatureAI.h b/src/server/game/AI/CreatureAI.h
index e9e5217cd32..581e409d21b 100644
--- a/src/server/game/AI/CreatureAI.h
+++ b/src/server/game/AI/CreatureAI.h
@@ -29,7 +29,7 @@ class GameObject;
 class PlayerAI;
 class WorldObject;
 struct Position;
-enum SpellFinishReason;
+enum SpellFinishReason : uint8;
 
 typedef std::vector<AreaBoundary const*> CreatureBoundary;
 
diff --git a/src/server/game/Spells/Spell.h b/src/server/game/Spells/Spell.h
index a1fa8b58c0e..5566b1e4d36 100644
--- a/src/server/game/Spells/Spell.h
+++ b/src/server/game/Spells/Spell.h
@@ -100,7 +100,7 @@ enum SpellRangeFlag
     SPELL_RANGE_RANGED              = 2      //hunter range and ranged weapon
 };
 
-enum SpellFinishReason
+enum SpellFinishReason : uint8
 {
     SPELL_FINISHED_SUCCESSFUL_CAST      = 0, // spell has sucessfully launched
     SPELL_FINISHED_CANCELED             = 1, // spell has been canceled (interrupts)