diff --git a/common/src/main/java/com/viaversion/viabackwards/protocol/v1_16to1_15_2/rewriter/BlockItemPacketRewriter1_16.java b/common/src/main/java/com/viaversion/viabackwards/protocol/v1_16to1_15_2/rewriter/BlockItemPacketRewriter1_16.java
index 1af4e165..a5976495 100644
--- a/common/src/main/java/com/viaversion/viabackwards/protocol/v1_16to1_15_2/rewriter/BlockItemPacketRewriter1_16.java
+++ b/common/src/main/java/com/viaversion/viabackwards/protocol/v1_16to1_15_2/rewriter/BlockItemPacketRewriter1_16.java
@@ -148,9 +148,9 @@ protected void registerPackets() {
             do {
                 slot = wrapper.read(Types.BYTE);
                 Item item = handleItemToClient(wrapper.user(), wrapper.read(Types.ITEM1_13_2));
-                int rawSlot = slot & 127;
+                int rawSlot = slot & 0x7F;
                 equipmentData.add(new EquipmentData(rawSlot, item));
-            } while ((slot & -128) != 0);
+            } while ((slot & 0xFFFFFF80) != 0);
 
             // Send first data in the current packet
             EquipmentData firstData = equipmentData.get(0);
diff --git a/common/src/main/java/com/viaversion/viabackwards/protocol/v1_20_2to1_20/rewriter/BlockItemPacketRewriter1_20_2.java b/common/src/main/java/com/viaversion/viabackwards/protocol/v1_20_2to1_20/rewriter/BlockItemPacketRewriter1_20_2.java
index 7d30e05e..392cb6cb 100644
--- a/common/src/main/java/com/viaversion/viabackwards/protocol/v1_20_2to1_20/rewriter/BlockItemPacketRewriter1_20_2.java
+++ b/common/src/main/java/com/viaversion/viabackwards/protocol/v1_20_2to1_20/rewriter/BlockItemPacketRewriter1_20_2.java
@@ -192,7 +192,7 @@ public void register() {
                     do {
                         slot = wrapper.passthrough(Types.BYTE);
                         wrapper.write(Types.ITEM1_13_2, handleItemToClient(wrapper.user(), wrapper.read(Types.ITEM1_20_2)));
-                    } while ((slot & -128) != 0);
+                    } while ((slot & 0xFFFFFF80) != 0);
                 });
             }
         });
diff --git a/common/src/main/java/com/viaversion/viabackwards/protocol/v1_20_5to1_20_3/rewriter/EntityPacketRewriter1_20_5.java b/common/src/main/java/com/viaversion/viabackwards/protocol/v1_20_5to1_20_3/rewriter/EntityPacketRewriter1_20_5.java
index 69127488..ac9c8b7e 100644
--- a/common/src/main/java/com/viaversion/viabackwards/protocol/v1_20_5to1_20_3/rewriter/EntityPacketRewriter1_20_5.java
+++ b/common/src/main/java/com/viaversion/viabackwards/protocol/v1_20_5to1_20_3/rewriter/EntityPacketRewriter1_20_5.java
@@ -77,11 +77,11 @@ public void registerPackets() {
             do {
                 slot = wrapper.read(Types.BYTE);
                 final Item item = protocol.getItemRewriter().handleItemToClient(wrapper.user(), wrapper.read(Types1_20_5.ITEM));
-                final int rawSlot = slot & 127;
+                final int rawSlot = slot & 0x7F;
 
                 if (rawSlot == 6) {
-                    final boolean lastSlot = (slot & -128) == 0;
-                    slot = (byte) (lastSlot ? 4 : 4 | -128); // Map body slot index to chest slot index for horses, also wolves
+                    final boolean lastSlot = (slot & 0xFFFFFF80) == 0;
+                    slot = (byte) (lastSlot ? 4 : 4 | 0xFFFFFF80); // Map body slot index to chest slot index for horses, also wolves
 
                     if (type != null && type.isOrHasParent(EntityTypes1_20_5.LLAMA)) {
                         // Cancel equipment and set correct entity data instead
@@ -92,7 +92,7 @@ public void registerPackets() {
 
                 wrapper.write(Types.BYTE, slot);
                 wrapper.write(Types.ITEM1_20_2, item);
-            } while ((slot & -128) != 0);
+            } while ((slot & 0xFFFFFF80) != 0);
         });
 
         protocol.registerClientbound(ClientboundPackets1_20_5.HORSE_SCREEN_OPEN, wrapper -> {