diff --git a/LEGO1/legoanimationmanager.h b/LEGO1/legoanimationmanager.h
index 5fae368e..c42b7715 100644
--- a/LEGO1/legoanimationmanager.h
+++ b/LEGO1/legoanimationmanager.h
@@ -24,7 +24,7 @@ public:
   // OFFSET: LEGO1 0x1005ec90
   inline virtual MxBool IsA(const char *name) const override // vtable+0x10
   {
-    return !strcmp(name, LegoAnimationManager::ClassName()) || MxCore::IsA(name);
+    return !strcmp(name, ClassName()) || MxCore::IsA(name);
   }
 
   __declspec(dllexport) static void configureLegoAnimationManager(int param_1);
diff --git a/LEGO1/legocameracontroller.h b/LEGO1/legocameracontroller.h
index af5015ae..15afff7f 100644
--- a/LEGO1/legocameracontroller.h
+++ b/LEGO1/legocameracontroller.h
@@ -21,7 +21,7 @@ public:
   // OFFSET: LEGO1 0x10011ed0
   inline virtual MxBool IsA(const char *name) const override // vtable+0x10
   {
-    return !strcmp(name, LegoCameraController::ClassName()) || MxCore::IsA(name);
+    return !strcmp(name, ClassName()) || MxCore::IsA(name);
   }
 
 };
diff --git a/LEGO1/legohideanimpresenter.h b/LEGO1/legohideanimpresenter.h
index 0c078e9b..abc63d78 100644
--- a/LEGO1/legohideanimpresenter.h
+++ b/LEGO1/legohideanimpresenter.h
@@ -20,7 +20,7 @@ public:
   // OFFSET: LEGO1 0x1006d890
   inline MxBool IsA(const char *name) const override // vtable+0x10
   {
-    return !strcmp(name, LegoHideAnimPresenter::ClassName()) || LegoAnimPresenter::IsA(name);
+    return !strcmp(name, ClassName()) || LegoAnimPresenter::IsA(name);
   }
   
 private:
diff --git a/LEGO1/legolocomotionanimpresenter.h b/LEGO1/legolocomotionanimpresenter.h
index b5906ca6..89a3039c 100644
--- a/LEGO1/legolocomotionanimpresenter.h
+++ b/LEGO1/legolocomotionanimpresenter.h
@@ -19,7 +19,7 @@ public:
   // OFFSET: LEGO1 0x1006ce60
   inline MxBool IsA(const char *name) const override // vtable+0x10
   {
-    return !strcmp(name, LegoLocomotionAnimPresenter::ClassName()) || LegoLoopingAnimPresenter::IsA(name);
+    return !strcmp(name, ClassName()) || LegoLoopingAnimPresenter::IsA(name);
   }
   
 private:
diff --git a/LEGO1/legoloopinganimpresenter.h b/LEGO1/legoloopinganimpresenter.h
index 6e4a5eb1..672ff260 100644
--- a/LEGO1/legoloopinganimpresenter.h
+++ b/LEGO1/legoloopinganimpresenter.h
@@ -18,7 +18,7 @@ public:
   // OFFSET: LEGO1 0x1000c9b0
   inline MxBool IsA(const char *name) const override // vtable+0x10
   {
-    return !strcmp(name, LegoLoopingAnimPresenter::ClassName()) || LegoAnimPresenter::IsA(name);
+    return !strcmp(name, ClassName()) || LegoAnimPresenter::IsA(name);
   }
 };
 
diff --git a/LEGO1/legonavcontroller.h b/LEGO1/legonavcontroller.h
index d2bf7df7..9bffd7dd 100644
--- a/LEGO1/legonavcontroller.h
+++ b/LEGO1/legonavcontroller.h
@@ -32,7 +32,7 @@ public:
   // OFFSET: LEGO1 0x10054b90
   inline MxBool IsA(const char *name) const override // vtable+0x10
   {
-    return !strcmp(name, LegoNavController::ClassName()) || MxCore::IsA(name);
+    return !strcmp(name, ClassName()) || MxCore::IsA(name);
   }
 
   void SetControlMax(int p_hMax, int p_vMax);
diff --git a/LEGO1/legopalettepresenter.h b/LEGO1/legopalettepresenter.h
index bb1b116e..d5fbefba 100644
--- a/LEGO1/legopalettepresenter.h
+++ b/LEGO1/legopalettepresenter.h
@@ -21,7 +21,7 @@ public:
   // OFFSET: LEGO1 0x10079f40
   inline MxBool IsA(const char *name) const override // vtable+0x10
   {
-    return !strcmp(name, LegoPalettePresenter::ClassName()) || MxVideoPresenter::IsA(name);
+    return !strcmp(name, ClassName()) || MxVideoPresenter::IsA(name);
   }
 
 private:
diff --git a/LEGO1/mxstreamprovider.h b/LEGO1/mxstreamprovider.h
index fda71bb1..796d0ed3 100644
--- a/LEGO1/mxstreamprovider.h
+++ b/LEGO1/mxstreamprovider.h
@@ -6,7 +6,18 @@
 // VTABLE 0x100dd100
 class MxStreamProvider : public MxCore
 {
+public:
+  // OFFSET: LEGO1 0x100d07e0
+  inline virtual const char *ClassName() const override // vtable+0x0c
+  {
+    return "MxStreamProvider";
+  }
 
+  // OFFSET: LEGO1 0x100d07f0
+  inline virtual MxBool IsA(const char *name) const override // vtable+0x10
+  {
+    return !strcmp(name, MxStreamProvider::ClassName()) || MxCore::IsA(name);
+  }
 };
 
 #endif // MXSTREAMPROVIDER_H