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diff --git a/wine/include/winnt.h b/wine/include/winnt.h
index 477bd87..d9357fd 100644
--- a/wine/include/winnt.h
+++ b/wine/include/winnt.h
@@ -2043,6 +2043,29 @@ typedef ARM64_NT_CONTEXT CONTEXT, *PCONTEXT;
#endif /* __aarch64__ */
+#if defined(__LIBWINEVBS__) && defined(__EMSCRIPTEN__)
+/* libwinevbs-only: wasm32 has no real CPU context / SEH unwinding to describe.
+ * This library never performs structured exception handling or stack
+ * unwinding (no real threads, no SEH usage) - these types only need to exist
+ * so the unconditional NTSYSAPI declarations below type-check. */
+#define CONTEXT_FULL 0x1
+
+typedef struct _RUNTIME_FUNCTION
+{
+ DWORD dummy;
+} RUNTIME_FUNCTION, *PRUNTIME_FUNCTION;
+
+typedef struct _CONTEXT
+{
+ DWORD ContextFlags;
+} CONTEXT, *PCONTEXT;
+
+typedef struct _KNONVOLATILE_CONTEXT_POINTERS
+{
+ DWORD dummy;
+} KNONVOLATILE_CONTEXT_POINTERS, *PKNONVOLATILE_CONTEXT_POINTERS;
+#endif /* __LIBWINEVBS__ && __EMSCRIPTEN__ */
+
#if !defined(CONTEXT_FULL) && !defined(RC_INVOKED)
#error You need to define a CONTEXT for your CPU
#endif