diff --git a/src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/MatteryDeviceBlockEntity.kt b/src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/MatteryDeviceBlockEntity.kt
index c12d6d5b1..74216b68f 100644
--- a/src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/MatteryDeviceBlockEntity.kt
+++ b/src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/MatteryDeviceBlockEntity.kt
@@ -447,7 +447,9 @@ abstract class MatteryDeviceBlockEntity(blockEntityType: BlockEntityType<*>, blo
 
 			if (input == null && output == null && inputOutput == null) {
 				return ItemHandlerMode.DISABLED
-			} else if (input != null && output != null || inputOutput != null) {
+			} else if (inputOutput != null) {
+				return ItemHandlerMode.INPUT_OUTPUT
+			} else if (input != null && output != null) {
 				return when (side) {
 					RelativeSide.FRONT, RelativeSide.BACK -> ItemHandlerMode.DISABLED
 					RelativeSide.RIGHT, RelativeSide.TOP -> ItemHandlerMode.INPUT