diff --git a/mingw-w64-crt/misc/arm64ec/longjmp.c b/mingw-w64-crt/misc/arm64ec/longjmp.c
new file mode 100644
index 0000000..8510fda
--- /dev/null
+++ b/mingw-w64-crt/misc/arm64ec/longjmp.c
@@ -0,0 +1,30 @@
+/**
+ * This file has no copyright assigned and is placed in the Public Domain.
+ * This file is part of the mingw-w64 runtime package.
+ * No warranty is given; refer to the file DISCLAIMER.PD within this package.
+ */
+
+#undef __MSVCRT_VERSION__
+#define _UCRT
+
+#include <setjmp.h>
+#include <windef.h>
+#include <winbase.h>
+
+void __cdecl longjmp( jmp_buf b, int retval )
+{
+    _JUMP_BUFFER *buf = (_JUMP_BUFFER *)b;
+    EXCEPTION_RECORD rec;
+
+    if (!retval) retval = 1;
+
+    rec.ExceptionCode = STATUS_LONGJUMP;
+    rec.ExceptionFlags = 0;
+    rec.ExceptionRecord = NULL;
+    rec.ExceptionAddress = NULL;
+    rec.NumberParameters = 1;
+    rec.ExceptionInformation[0] = (DWORD_PTR)buf;
+    RtlUnwind( (void *)buf->Frame, (void *)buf->Rip, &rec, IntToPtr(retval) );
+}
+
+void (__cdecl *__MINGW_IMP_SYMBOL(longjmp))( jmp_buf b, int retval ) = longjmp;