diff --git a/core/postinit.js b/core/postinit.js
index 089dc7d..e8049b1 100644
--- a/core/postinit.js
+++ b/core/postinit.js
@@ -1249,6 +1249,9 @@ const modapi_postinit = "(" + (() => {
         return qhash(entity, values, 127);
     }
     ModAPI.keygen.sound = function (soundId) {
+        if (!ModAPI.is_1_12) {
+            return -1;
+        }
         const SoundEvent = ModAPI.reflect.getClassByName("SoundEvent")
         const values = ModAPI.util.wrap(SoundEvent.staticVariables.REGISTRY).getCorrective().underlyingIntegerMap.identityMap.elementData.filter(x=>!!x).map(y=>y.value.value);
         return qhash(soundId, values, 4095);