diff --git a/src/main/kotlin/ru/dbotthepony/mc/otm/matter/MatterManager.kt b/src/main/kotlin/ru/dbotthepony/mc/otm/matter/MatterManager.kt
index eb7598029..ace43d303 100644
--- a/src/main/kotlin/ru/dbotthepony/mc/otm/matter/MatterManager.kt
+++ b/src/main/kotlin/ru/dbotthepony/mc/otm/matter/MatterManager.kt
@@ -1346,8 +1346,8 @@ object MatterManager {
 		val multiplier: Double = 1.0
 	) {
 		init {
-			require(!multiplier.isNaN()) { "Provided stack cost multiplier is NaN" }
-			require(!multiplier.isInfinite()) { "Provided stack cost multiplier is infinite" }
+			require(!multiplier.isNaN()) { "Provided stack (${item.registryName}) cost multiplier is NaN" }
+			require(!multiplier.isInfinite()) { "Provided stack (${item.registryName}) cost multiplier is infinite" }
 		}
 
 		constructor(item: Item, count: Int) : this(item, 1.0 / count.toDouble())