diff --git a/ClassicalSharp/Network/CPESupport.cs b/ClassicalSharp/Network/CPESupport.cs
index 1da9821ce..484e58d7d 100644
--- a/ClassicalSharp/Network/CPESupport.cs
+++ b/ClassicalSharp/Network/CPESupport.cs
@@ -68,6 +68,7 @@ namespace ClassicalSharp.Network {
 				net.packetSizes[Opcode.SetBlock] += 1;
 				net.packetSizes[Opcode.CpeHoldThis] += 1;
 				net.packetSizes[Opcode.CpeDefineBlock] += 1;
+				net.packetSizes[Opcode.CpeSetBlockPermission] += 1;
 				net.packetSizes[Opcode.CpeUndefineBlock] += 1;
 				net.packetSizes[Opcode.CpeDefineBlockExt] += 1;
 				net.packetSizes[Opcode.CpeSetInventoryOrder] += 1;
diff --git a/ClassicalSharp/Network/Protocols/CPE.cs b/ClassicalSharp/Network/Protocols/CPE.cs
index 51e8d9f5b..479838d37 100644
--- a/ClassicalSharp/Network/Protocols/CPE.cs
+++ b/ClassicalSharp/Network/Protocols/CPE.cs
@@ -198,9 +198,9 @@ namespace ClassicalSharp.Network.Protocols {
 		}
 		
 		void HandleSetBlockPermission() {
-			byte blockId = reader.ReadUInt8();
-			BlockInfo.CanPlace[blockId]  = reader.ReadUInt8() != 0;
-			BlockInfo.CanDelete[blockId] = reader.ReadUInt8() != 0;
+			BlockID block = reader.ReadBlock();
+			BlockInfo.CanPlace[block]  = reader.ReadUInt8() != 0;
+			BlockInfo.CanDelete[block] = reader.ReadUInt8() != 0;
 			game.Events.RaiseBlockPermissionsChanged();
 		}