diff --git a/reactos/include/ndk/rtltypes.h b/reactos/include/ndk/rtltypes.h
index 42df9d337d4..9613a2f1a6c 100644
--- a/reactos/include/ndk/rtltypes.h
+++ b/reactos/include/ndk/rtltypes.h
@@ -760,6 +760,16 @@ typedef struct _RTL_CALLER_ALLOCATED_ACTIVATION_CONTEXT_STACK_FRAME_EXTENDED
 } RTL_CALLER_ALLOCATED_ACTIVATION_CONTEXT_STACK_FRAME_EXTENDED,
   *PRTL_CALLER_ALLOCATED_ACTIVATION_CONTEXT_STACK_FRAME_EXTENDED;
 
+typedef struct _ACTIVATION_CONTEXT_STACK
+{
+    PRTL_ACTIVATION_CONTEXT_STACK_FRAME ActiveFrame;
+    LIST_ENTRY FrameListCache;
+    ULONG Flags;
+    ULONG NextCookieSequenceNumber;
+    ULONG StackId;
+} ACTIVATION_CONTEXT_STACK,
+  *PACTIVATION_CONTEXT_STACK;
+
 #endif
 
 //
diff --git a/reactos/include/psdk/vfw.h b/reactos/include/psdk/vfw.h
index 596d485a4e3..8b0638b9ddf 100644
--- a/reactos/include/psdk/vfw.h
+++ b/reactos/include/psdk/vfw.h
@@ -25,6 +25,8 @@ typedef struct IAVIFile *PAVIFILE;
 typedef struct IGetFrame *PGETFRAME;
 typedef struct IAVIEditStream *PAVIEDITSTREAM;
 
+#define ICVERSION 0x0104
+
 #define	ICERR_OK	0
 #define	ICERR_DONTDRAW	1
 #define	ICERR_NEWPALETTE	2