diff --git a/common/spdat.h b/common/spdat.h
index 6c12ae033..4f8717f4b 100644
--- a/common/spdat.h
+++ b/common/spdat.h
@@ -211,6 +211,7 @@
 #define SPELL_BATTLE_CRY_OF_THE_MASTRUQ 5031
 #define SPELL_ANCIENT_CRY_OF_CHAOS 5032
 #define SPELL_BLOODTHIRST 8476
+#define SPELL_AMPLIFICATION 2603
 
 // discipline IDs.
 #define DISC_UNHOLY_AURA 4520
diff --git a/zone/client_mods.cpp b/zone/client_mods.cpp
index 3079be305..aff88c07c 100644
--- a/zone/client_mods.cpp
+++ b/zone/client_mods.cpp
@@ -1455,7 +1455,7 @@ int32 Client::CalcATK()
 
 uint32 Mob::GetInstrumentMod(uint16 spell_id)
 {
-	if (GetClass() != Class::Bard) {
+	if (GetClass() != Class::Bard || spells[spell_id].is_discipline || spell_id == SPELL_AMPLIFICATION) {
 		//Other classes can get a base effects mod using SPA 413
 		if (HasBaseEffectFocus()) {
 			return (10 + (GetFocusEffect(focusFcBaseEffects, spell_id) / 10));//TODO: change action->instrument mod to float to support < 10% focus values