diff --git a/lib/pc/index.js b/lib/pc/index.js
index 1e8039a..e57e55c 100644
--- a/lib/pc/index.js
+++ b/lib/pc/index.js
@@ -20,7 +20,12 @@ module.exports = (data, staticData) => {
               formatString: staticData.language[d.translation_key] || d.translation_key /* chat type minecraft:raw has the formatString given directly by the translation key */,
               parameters: d.parameters
             }
-            data.chatFormattingById[chatType.id] = n
+            if (staticData.supportFeature('incrementedChatType')) {
+              // 1.21 - Player chat packet chat type now starts at 1
+              data.chatFormattingById[chatType.id + 1] = n
+            } else {
+              data.chatFormattingById[chatType.id] = n
+            }
             data.chatFormattingByName[chatType.name] = n
           }
         },