diff --git a/src/main/kotlin/ru/dbotthepony/mc/otm/client/screen/MatteryScreen.kt b/src/main/kotlin/ru/dbotthepony/mc/otm/client/screen/MatteryScreen.kt
index d5ce7f1bb..b2c5b5f4a 100644
--- a/src/main/kotlin/ru/dbotthepony/mc/otm/client/screen/MatteryScreen.kt
+++ b/src/main/kotlin/ru/dbotthepony/mc/otm/client/screen/MatteryScreen.kt
@@ -195,7 +195,7 @@ abstract class MatteryScreen<T : MatteryMenu>(menu: T, inventory: Inventory, tit
 
 		require(indexOf != -1) { "No such panel $panel" }
 
-		if (indexOf == panels.size - 1) {
+		if (indexOf == 0) {
 			return
 		}