diff --git a/Source/objects.cpp b/Source/objects.cpp
index 471343ef3..b17260919 100644
--- a/Source/objects.cpp
+++ b/Source/objects.cpp
@@ -2524,10 +2524,12 @@ void OperateShrineCostOfWisdom(Player &player, SpellID spellId, diablo_message m
 		}
 	}
 
-	const int maxBase = std::max(0, player._pMaxManaBase);
-	const int penalty = maxBase / 10; // 10% of max base mana (>= 0)
+	if (player._pMaxManaBase < 0)
+		player._pMaxManaBase = 0;
 
-	ModifyPlrManaCapacity(player, -penalty);
+	const int penalty = player._pMaxManaBase / 10;
+
+	ModifyPlrManaCapacity(player, -penalty, true);
 	RedrawEverything();
 	InitDiabloMsg(message);
 }
diff --git a/Source/player.cpp b/Source/player.cpp
index 21a7e7dfb..e3c2cb110 100644
--- a/Source/player.cpp
+++ b/Source/player.cpp
@@ -3389,9 +3389,6 @@ void ModifyPlrManaCapacity(Player &player, int delta, bool shiftCurrent)
 		player._pManaBase = std::min(player._pManaBase, player._pMaxManaBase);
 		player._pMana = std::min(player._pMana, player._pMaxMana);
 	}
-
-	if (&player == MyPlayer)
-		RedrawComponent(PanelDrawComponent::Mana);
 }
 
 void SetPlayerHitPoints(Player &player, int val)