diff --git a/src/main/kotlin/ru/dbotthepony/mc/otm/item/MatterDustItem.kt b/src/main/kotlin/ru/dbotthepony/mc/otm/item/MatterDustItem.kt
index 4a6a52d04..06b29621e 100644
--- a/src/main/kotlin/ru/dbotthepony/mc/otm/item/MatterDustItem.kt
+++ b/src/main/kotlin/ru/dbotthepony/mc/otm/item/MatterDustItem.kt
@@ -61,7 +61,7 @@ class MatterDustItem : Item(Properties().stacksTo(64)), IMatterItem {
 
 		val matterThis = matter(stack)
 
-		if (matterThis >= ItemsConfig.MATTER_DUST_CAPACITY)
+		if (matterThis >= ItemsConfig.MATTER_DUST_CAPACITY && matter.isPositive)
 			return Decimal.ZERO
 
 		val newMatter = (matterThis + matter).coerceAtMost(ItemsConfig.MATTER_DUST_CAPACITY)