diff --git a/src/Data/Skills/act_int.lua b/src/Data/Skills/act_int.lua
index f22875272b..b56a07e3b9 100644
--- a/src/Data/Skills/act_int.lua
+++ b/src/Data/Skills/act_int.lua
@@ -866,7 +866,7 @@ skills["BlasphemyPlayer"] = {
 			statDescriptionScope = "skill_stat_descriptions",
 			statMap = {
 				["blasphemy_base_spirit_reservation_per_socketed_curse"] = {
-					mod("SkillData", "LIST", { key = "spiritReservationFlat", value = nil })
+					mod("SkillData", "LIST", { key = "blasphemyReservationFlatSpirit", value = nil })
 				},
 			},
 			baseFlags = {
diff --git a/src/Export/Skills/act_int.txt b/src/Export/Skills/act_int.txt
index d6d08b007e..38491a7a74 100644
--- a/src/Export/Skills/act_int.txt
+++ b/src/Export/Skills/act_int.txt
@@ -80,7 +80,7 @@ statMap = {
 #flags area
 statMap = {
 	["blasphemy_base_spirit_reservation_per_socketed_curse"] = {
-		mod("SkillData", "LIST", { key = "spiritReservationFlat", value = nil })
+		mod("SkillData", "LIST", { key = "blasphemyReservationFlatSpirit", value = nil })
 	},
 },
 #mods
diff --git a/src/Modules/CalcDefence.lua b/src/Modules/CalcDefence.lua
index eef6edcae8..0102fc1846 100644
--- a/src/Modules/CalcDefence.lua
+++ b/src/Modules/CalcDefence.lua
@@ -210,7 +210,7 @@ function calcs.doActorLifeManaSpiritReservation(actor)
 				if activeSkill.skillData[name.."ReservationFlatForced"] then
 					values.reservedFlat = activeSkill.skillData[name.."ReservationFlatForced"]
 				else
-					local baseFlatVal = values.baseFlat
+					local baseFlatVal = values.baseFlat * mult
 					values.reservedFlat = 0
 					if values.more > 0 and values.inc > -100 and baseFlatVal ~= 0 then
 						values.reservedFlat = m_max(m_ceil(baseFlatVal * (100 + values.inc) / 100 * values.more / (1 + values.efficiency / 100), 0), 0)
@@ -232,17 +232,19 @@ function calcs.doActorLifeManaSpiritReservation(actor)
 				if activeSkill.skillTypes[SkillType.MultipleReservation] then
 					local activeSkillCount, enabled = calcs.getActiveSkillCount(activeSkill)
 					local minionFreeSpiritCount = skillModList:Sum("BASE", skillCfg, "MinionFreeSpiritCount")
-					values.reservedFlat = values.reservedFlat * mult * m_max(activeSkillCount - minionFreeSpiritCount, 0)
+					values.reservedFlat = values.reservedFlat * m_max(activeSkillCount - minionFreeSpiritCount, 0)
 				end
-				
-				if activeSkill.skillTypes[SkillType.IsBlasphemy] and activeSkill.activeEffect.srcInstance.supportEffect and activeSkill.activeEffect.srcInstance.supportEffect.isSupporting then
+				if activeSkill.skillTypes[SkillType.IsBlasphemy] and activeSkill.activeEffect.srcInstance.supportEffect and activeSkill.activeEffect.srcInstance.supportEffect.isSupporting and activeSkill.skillData["blasphemyReservationFlat" .. name] then
 					-- Sadly no better way to get key/val table element count in lua.
 					local instances = 0
 					for _ in pairs(activeSkill.activeEffect.srcInstance.supportEffect.isSupporting) do
 						instances = instances + 1
 					end
-					values.reservedFlat = values.reservedFlat * instances * mult
-					values.reservedPercent = values.reservedPercent * instances * mult
+
+					-- Extra reservation of blasphemy needs to be separated from the reservation caused by curses
+					local blasphemyFlat = activeSkill.skillData["blasphemyReservationFlat" .. name]
+					local blasphemyEffectiveFlat = m_max(m_ceil(blasphemyFlat * mult * (100 + values.inc) / 100 * values.more / (1 + values.efficiency / 100), 0), 0)
+					values.reservedFlat = values.reservedFlat + blasphemyEffectiveFlat * instances
 				end
 					-- Blood Sacrament increases reservation per stage channelled
 				if activeSkill.skillCfg.skillName == "Blood Sacrament" and activeSkill.activeStageCount then