diff --git a/src/Ryujinx.HLE/HOS/Services/Am/AppletAE/AllSystemAppletProxiesService/LibraryAppletCreator/ILibraryAppletAccessor.cs b/src/Ryujinx.HLE/HOS/Services/Am/AppletAE/AllSystemAppletProxiesService/LibraryAppletCreator/ILibraryAppletAccessor.cs
index cd71103ca..5d23bec9d 100644
--- a/src/Ryujinx.HLE/HOS/Services/Am/AppletAE/AllSystemAppletProxiesService/LibraryAppletCreator/ILibraryAppletAccessor.cs
+++ b/src/Ryujinx.HLE/HOS/Services/Am/AppletAE/AllSystemAppletProxiesService/LibraryAppletCreator/ILibraryAppletAccessor.cs
@@ -120,22 +120,26 @@ namespace Ryujinx.HLE.HOS.Services.Am.AppletAE.AllSystemAppletProxiesService.Lib
         }
         
         [CommandCmif(90)]
-        // Unknown90(ulong[4])
-        public ResultCode Unknown90(ServiceCtx context)
+        // StartEx(ulong[4])
+        public ResultCode StartEx(ServiceCtx context)
         {
             // NOTE: This call is performed on SDK 20+ when applet is called.
             //       Since we don't support most applets for now, it's fine to stub it.
+            //
+            //       This method takes an array of 4 unsigned longs and performs a calculation.
+            //       If that calculation fails, then this method runs Start().
             //       Throw if values are not 0 to learn more about what this function does.
+            //       alt:(buffer<u8, 20> unknown)
 
-            if (context.RequestData.ReadUInt64() != 0 || context.RequestData.ReadUInt64() != 0 ||
-                context.RequestData.ReadUInt64() != 0 || context.RequestData.ReadUInt64() != 0)
+            if (context.RequestData.ReadUInt64() != 0
+             || context.RequestData.ReadUInt64() != 0 
+             || context.RequestData.ReadUInt64() != 0 
+             || context.RequestData.ReadUInt64() != 0)
             {
-                throw new ServiceNotImplementedException(this, context, $"{GetType().FullName}: 90");
+                throw new ServiceNotImplementedException(this, context, $"{GetType().FullName}: StartEx");
             }
 
-            Logger.Stub?.PrintStub(LogClass.ServiceAm);
-            return ResultCode.Success;
-        }
+            return (ResultCode)_applet.Start(_normalSession.GetConsumer(), _interactiveSession.GetConsumer());
 
         [CommandCmif(100)]
         // PushInData(object<nn::am::service::IStorage>)