diff --git a/mingw-w64-headers/include/winnt.h b/mingw-w64-headers/include/winnt.h
index 6120c92..e76e302 100644
--- a/mingw-w64-headers/include/winnt.h
+++ b/mingw-w64-headers/include/winnt.h
@@ -8537,6 +8537,9 @@
 #elif defined (__arm__)
     typedef IMAGE_ARM_RUNTIME_FUNCTION_ENTRY IMAGE_RUNTIME_FUNCTION_ENTRY;
     typedef PIMAGE_ARM_RUNTIME_FUNCTION_ENTRY PIMAGE_RUNTIME_FUNCTION_ENTRY;
+#elif defined (__aarch64__)
+    typedef IMAGE_ARM64_RUNTIME_FUNCTION_ENTRY IMAGE_RUNTIME_FUNCTION_ENTRY;
+    typedef PIMAGE_ARM64_RUNTIME_FUNCTION_ENTRY PIMAGE_RUNTIME_FUNCTION_ENTRY;
 #else
     typedef _IMAGE_RUNTIME_FUNCTION_ENTRY IMAGE_RUNTIME_FUNCTION_ENTRY;
     typedef _PIMAGE_RUNTIME_FUNCTION_ENTRY PIMAGE_RUNTIME_FUNCTION_ENTRY;