diff --git a/src/main/kotlin/ru/dbotthepony/mc/otm/capability/Ext.kt b/src/main/kotlin/ru/dbotthepony/mc/otm/capability/Ext.kt
index 26871d5a0..81b08130d 100644
--- a/src/main/kotlin/ru/dbotthepony/mc/otm/capability/Ext.kt
+++ b/src/main/kotlin/ru/dbotthepony/mc/otm/capability/Ext.kt
@@ -38,6 +38,9 @@ internal fun IEnergyStorage.receiveEnergy(amount: Decimal, simulate: Boolean): D
 		return receiveEnergyChecked(amount, simulate)
 
 	if (!amount.isPositive)
+		throw IllegalArgumentException("Negative energy: $amount")
+
+	if (!canReceive())
 		return Decimal.ZERO
 
 	if (amount > Decimal.INT_MAX_VALUE)
@@ -54,6 +57,9 @@ internal fun IEnergyStorage.extractEnergy(amount: Decimal, simulate: Boolean): D
 		return extractEnergyChecked(amount, simulate)
 
 	if (!amount.isPositive)
+		throw IllegalArgumentException("Negative energy: $amount")
+
+	if (!canExtract())
 		return Decimal.ZERO
 
 	if (amount > Decimal.INT_MAX_VALUE)