diff --git a/dtool/src/parser-inc/control.h b/dtool/src/parser-inc/control.h
new file mode 100644
index 0000000000..4599506ed7
--- /dev/null
+++ b/dtool/src/parser-inc/control.h
@@ -0,0 +1,6 @@
+class IMediaControl;
+class IGraphBuilder;
+class ICaptureGraphBuilder2;
+class IBaseFilter;
+class IVMRWindowlessControl;
+template <class T> class CComPtr;
diff --git a/dtool/src/parser-inc/windows.h b/dtool/src/parser-inc/windows.h
index 8098cb6ad3..56f0dd9582 100644
--- a/dtool/src/parser-inc/windows.h
+++ b/dtool/src/parser-inc/windows.h
@@ -26,6 +26,8 @@
 
 typedef bool BOOL;
 typedef long DWORD;
+typedef unsigned long ULONG;
+typedef long HRESULT;
 typedef int CRITICAL_SECTION;
 typedef int HANDLE;
 typedef void *LPVOID;