diff --git a/Userland/Libraries/LibJS/Runtime/ECMAScriptFunctionObject.cpp b/Userland/Libraries/LibJS/Runtime/ECMAScriptFunctionObject.cpp
index 0ba0eae4c9..cd500eb251 100644
--- a/Userland/Libraries/LibJS/Runtime/ECMAScriptFunctionObject.cpp
+++ b/Userland/Libraries/LibJS/Runtime/ECMAScriptFunctionObject.cpp
@@ -20,7 +20,6 @@
 #include <LibJS/Runtime/ExecutionContext.h>
 #include <LibJS/Runtime/FunctionEnvironment.h>
 #include <LibJS/Runtime/GeneratorObject.h>
-#include <LibJS/Runtime/GeneratorPrototype.h>
 #include <LibJS/Runtime/GlobalObject.h>
 #include <LibJS/Runtime/NativeFunction.h>
 #include <LibJS/Runtime/PromiseConstructor.h>
@@ -125,7 +124,7 @@ void ECMAScriptFunctionObject::initialize(GlobalObject& global_object)
         case FunctionKind::Async:
             break;
         case FunctionKind::AsyncGenerator:
-            // FIXME: Add the AsyncGeneratorObject and set it as prototype.
+            prototype = Object::create(global_object, global_object.async_generator_function_prototype_prototype());
             break;
         }
         // 27.7.4 AsyncFunction Instances, https://tc39.es/ecma262/#sec-async-function-instances
diff --git a/Userland/Libraries/LibJS/Runtime/FunctionConstructor.cpp b/Userland/Libraries/LibJS/Runtime/FunctionConstructor.cpp
index 6221af7650..c9a90f2a3f 100644
--- a/Userland/Libraries/LibJS/Runtime/FunctionConstructor.cpp
+++ b/Userland/Libraries/LibJS/Runtime/FunctionConstructor.cpp
@@ -250,12 +250,11 @@ ThrowCompletionOr<ECMAScriptFunctionObject*> FunctionConstructor::create_dynamic
     }
     // 34. Else if kind is asyncGenerator, then
     else if (kind == FunctionKind::AsyncGenerator) {
-        // FIXME: We only have %AsyncGeneratorFunction.prototype%, not %AsyncGeneratorFunction.prototype.prototype%!
         // a. Let prototype be OrdinaryObjectCreate(%AsyncGeneratorFunction.prototype.prototype%).
-        // prototype = Object::create(global_object, global_object.async_generator_prototype());
+        prototype = Object::create(global_object, global_object.async_generator_function_prototype_prototype());
 
         // b. Perform ! DefinePropertyOrThrow(F, "prototype", PropertyDescriptor { [[Value]]: prototype, [[Writable]]: true, [[Enumerable]]: false, [[Configurable]]: false }).
-        // function->define_direct_property(vm.names.prototype, prototype, Attribute::Writable);
+        function->define_direct_property(vm.names.prototype, prototype, Attribute::Writable);
     }
     // 35. Else if kind is normal, perform MakeConstructor(F).
     else if (kind == FunctionKind::Normal) {