diff --git a/src/main/java/gregtech/api/metatileentity/multiblock/AbilityInstances.java b/src/main/java/gregtech/api/metatileentity/multiblock/AbilityInstances.java
index 5f69ac57bde..d9c2517bb3c 100644
--- a/src/main/java/gregtech/api/metatileentity/multiblock/AbilityInstances.java
+++ b/src/main/java/gregtech/api/metatileentity/multiblock/AbilityInstances.java
@@ -110,7 +110,7 @@ public void add(int index, Object element) {
     }
 
     /**
-     * Replaces the element at the index. Will throw and exception if the element is not what the key expects.
+     * Replaces the element at the index. Will throw an exception if the element is not what the key expects.
      * 
      * @param index   index of the element to replace
      * @param element element to be stored at the specified position