diff --git a/projects/core/src/main/java/dan200/computercraft/core/asm/MethodSupplierImpl.java b/projects/core/src/main/java/dan200/computercraft/core/asm/MethodSupplierImpl.java
index 44e5775e4c..16141485d8 100644
--- a/projects/core/src/main/java/dan200/computercraft/core/asm/MethodSupplierImpl.java
+++ b/projects/core/src/main/java/dan200/computercraft/core/asm/MethodSupplierImpl.java
@@ -76,7 +76,7 @@ public boolean forEachMethod(Object object, TargetedConsumer<T> consumer) {
             for (var extra : source.getExtra()) {
                 var extraMethods = getMethods(extra.getClass());
                 if (!extraMethods.isEmpty()) hasMethods = true;
-                for (var method : extraMethods) consumer.accept(object, method.name(), method.method(), method);
+                for (var method : extraMethods) consumer.accept(extra, method.name(), method.method(), method);
             }
         }
 
diff --git a/projects/core/src/test/java/dan200/computercraft/core/asm/MethodTest.java b/projects/core/src/test/java/dan200/computercraft/core/asm/MethodTest.java
index a61b15ec00..c405250076 100644
--- a/projects/core/src/test/java/dan200/computercraft/core/asm/MethodTest.java
+++ b/projects/core/src/test/java/dan200/computercraft/core/asm/MethodTest.java
@@ -58,7 +58,7 @@ public void testDynamicPeripheral() {
 
     @Test
     public void testExtra() {
-        ComputerBootstrap.run("assert(extra.go, 'go')\nassert(extra.go2, 'go2')",
+        ComputerBootstrap.run("assert(extra.go() == nil, 'go')\nassert(extra.go2() == 456, 'go2')",
             x -> x.addApi(new ExtraObject()),
             50);
     }
@@ -163,7 +163,8 @@ public String[] getNames() {
         }
 
         @LuaFunction
-        public final void go2() {
+        public final int go2() {
+            return 456;
         }
 
         @Override