diff --git a/src/main/java/com/glodblock/github/extendedae/client/gui/subgui/SetAmount.java b/src/main/java/com/glodblock/github/extendedae/client/gui/subgui/SetAmount.java
index ad51f741..53d21f93 100644
--- a/src/main/java/com/glodblock/github/extendedae/client/gui/subgui/SetAmount.java
+++ b/src/main/java/com/glodblock/github/extendedae/client/gui/subgui/SetAmount.java
@@ -70,6 +70,6 @@ private void confirm() {
     }
 
     private long getMaxAmount() {
-        return 64L * (long) currentStack.what().getAmountPerUnit();
+        return 64L * (long) currentStack.what().getAmountPerOperation();
     }
 }
\ No newline at end of file