diff --git a/src/main/java/us/myles/ViaVersion/metadata/MetadataRewriter.java b/src/main/java/us/myles/ViaVersion/metadata/MetadataRewriter.java
index 7a4d6770d..1dad62f05 100644
--- a/src/main/java/us/myles/ViaVersion/metadata/MetadataRewriter.java
+++ b/src/main/java/us/myles/ViaVersion/metadata/MetadataRewriter.java
@@ -86,7 +86,10 @@ public class MetadataRewriter {
                             PacketUtil.writeString((String) value, output);
                             break;
                         case Boolean:
-                            output.writeBoolean(((Byte) value).byteValue() != 0);
+                            if(metaIndex == MetaIndex.AGEABLE_AGE)
+                                output.writeBoolean(((Byte) value).byteValue() < 0);
+                            else
+                                output.writeBoolean(((Byte) value).byteValue() != 0);
                             break;
                         case Slot:
                             PacketUtil.writeItem(value, output);