diff --git a/CHANGELOG.md b/CHANGELOG.md
index 752bdfd65..5512f3f71 100755
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,7 @@
 - The Crafting Monitor is now resizable and its size can be configured (stretched, small, medium, large) (raoulvdberge)
 - Removed the Wrench (raoulvdberge)
 - Made all IO blocks have a blacklist instead of a whitelist by default (raoulvdberge)
+- Made item storage disks and blocks capacity a power of two (1k now means 1024 items instead of 1000, etc) (raoulvdberge)
 - An empty blacklist now means: accept any item. An empty whitelist now means: don't accept any item (an empty whitelist USED to mean: accept any item) (raoulvdberge)
 - Updated Russian translation (kellixon)
 
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/block/ItemStorageType.java b/src/main/java/com/raoulvdberge/refinedstorage/block/ItemStorageType.java
index 54485e6af..211523513 100644
--- a/src/main/java/com/raoulvdberge/refinedstorage/block/ItemStorageType.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/block/ItemStorageType.java
@@ -3,10 +3,10 @@ package com.raoulvdberge.refinedstorage.block;
 import net.minecraft.util.IStringSerializable;
 
 public enum ItemStorageType implements IStringSerializable {
-    TYPE_1K(0, 1000, "1k"),
-    TYPE_4K(1, 4000, "4k"),
-    TYPE_16K(2, 16000, "16k"),
-    TYPE_64K(3, 64000, "64k"),
+    TYPE_1K(0, 1024, "1k"),
+    TYPE_4K(1, 4096, "4k"),
+    TYPE_16K(2, 16_384, "16k"),
+    TYPE_64K(3, 65_536, "64k"),
     TYPE_CREATIVE(4, -1, "creative");
 
     private int id;