diff --git a/Source/items.cpp b/Source/items.cpp
index 11e2df886900..231fdf335da0 100644
--- a/Source/items.cpp
+++ b/Source/items.cpp
@@ -831,7 +831,7 @@ int SaveItemPower(const Player &player, Item &item, ItemPower &power)
 		RedrawComponent(PanelDrawComponent::Mana);
 		break;
 	case IPL_DUR: {
-		int bonus = r * item._iMaxDur / 100;
+		int bonus = clamp(r * item._iMaxDur / 100, 0, DUR_INDESTRUCTIBLE - item._iMaxDur);
 		item._iMaxDur += bonus;
 		item._iDurability += bonus;
 	} break;