diff --git a/fml/patches/minecraft/net/minecraft/network/play/client/C17PacketCustomPayload.java.patch b/fml/patches/minecraft/net/minecraft/network/play/client/C17PacketCustomPayload.java.patch
index c7acfd978..1345ee125 100644
--- a/fml/patches/minecraft/net/minecraft/network/play/client/C17PacketCustomPayload.java.patch
+++ b/fml/patches/minecraft/net/minecraft/network/play/client/C17PacketCustomPayload.java.patch
@@ -4,7 +4,7 @@
      public void func_148840_b(PacketBuffer p_148840_1_) throws IOException
      {
          p_148840_1_.func_180714_a(this.field_149562_a);
-+        synchronized(this) { //This may be access multiple times, from multiple threads, lets be safe.
++        synchronized(this.field_149561_c) { //This may be access multiple times, from multiple threads, lets be safe.
 +        this.field_149561_c.markReaderIndex();
          p_148840_1_.writeBytes((ByteBuf)this.field_149561_c);
 +        this.field_149561_c.resetReaderIndex();
diff --git a/fml/patches/minecraft/net/minecraft/network/play/server/S3FPacketCustomPayload.java.patch b/fml/patches/minecraft/net/minecraft/network/play/server/S3FPacketCustomPayload.java.patch
index 7278ad7b1..ae048b6b5 100644
--- a/fml/patches/minecraft/net/minecraft/network/play/server/S3FPacketCustomPayload.java.patch
+++ b/fml/patches/minecraft/net/minecraft/network/play/server/S3FPacketCustomPayload.java.patch
@@ -4,7 +4,7 @@
      public void func_148840_b(PacketBuffer p_148840_1_) throws IOException
      {
          p_148840_1_.func_180714_a(this.field_149172_a);
-+        synchronized(this) { //This may be access multiple times, from multiple threads, lets be safe.
++        synchronized(this.field_149171_b) { //This may be access multiple times, from multiple threads, lets be safe.
 +        this.field_149171_b.markReaderIndex();
          p_148840_1_.writeBytes((ByteBuf)this.field_149171_b);
 +        this.field_149171_b.resetReaderIndex();