diff --git a/mingw-w64-crt/misc/arm64ec/longjmp.c b/mingw-w64-crt/misc/arm64ec/longjmp.c
index 8510fda..4ad0435 100644
--- a/mingw-w64-crt/misc/arm64ec/longjmp.c
+++ b/mingw-w64-crt/misc/arm64ec/longjmp.c
@@ -25,6 +25,7 @@
     rec.NumberParameters = 1;
     rec.ExceptionInformation[0] = (DWORD_PTR)buf;
     RtlUnwind( (void *)buf->Frame, (void *)buf->Rip, &rec, IntToPtr(retval) );
+    __builtin_unreachable();
 }
 
 void (__cdecl *__MINGW_IMP_SYMBOL(longjmp))( jmp_buf b, int retval ) = longjmp;
diff --git a/mingw-w64-headers/include/winnt.h b/mingw-w64-headers/include/winnt.h
index 9e57bb1..38b4d4f 100644
--- a/mingw-w64-headers/include/winnt.h
+++ b/mingw-w64-headers/include/winnt.h
@@ -9140,27 +9140,27 @@
 #endif
 
 #if WINAPI_FAMILY_PARTITION (WINAPI_PARTITION_APP)
-    NTSYSAPI VOID NTAPI __MINGW_ATTRIB_NORETURN RtlUnwind (PVOID TargetFrame, PVOID TargetIp, PEXCEPTION_RECORD ExceptionRecord, PVOID ReturnValue);
+    NTSYSAPI VOID NTAPI RtlUnwind (PVOID TargetFrame, PVOID TargetIp, PEXCEPTION_RECORD ExceptionRecord, PVOID ReturnValue);
     NTSYSAPI PVOID NTAPI RtlPcToFileHeader (PVOID PcValue, PVOID *BaseOfImage);
 #if defined (__x86_64__)
     NTSYSAPI PRUNTIME_FUNCTION NTAPI RtlLookupFunctionEntry (DWORD64 ControlPc, PDWORD64 ImageBase, PUNWIND_HISTORY_TABLE HistoryTable);
-    NTSYSAPI VOID NTAPI __MINGW_ATTRIB_NORETURN RtlUnwindEx (PVOID TargetFrame, PVOID TargetIp, PEXCEPTION_RECORD ExceptionRecord, PVOID ReturnValue, PCONTEXT ContextRecord, PUNWIND_HISTORY_TABLE HistoryTable);
+    NTSYSAPI VOID NTAPI RtlUnwindEx (PVOID TargetFrame, PVOID TargetIp, PEXCEPTION_RECORD ExceptionRecord, PVOID ReturnValue, PCONTEXT ContextRecord, PUNWIND_HISTORY_TABLE HistoryTable);
     NTSYSAPI PEXCEPTION_ROUTINE NTAPI RtlVirtualUnwind (DWORD HandlerType, DWORD64 ImageBase, DWORD64 ControlPc, PRUNTIME_FUNCTION FunctionEntry, PCONTEXT ContextRecord, PVOID *HandlerData, PDWORD64 EstablisherFrame, PKNONVOLATILE_CONTEXT_POINTERS ContextPointers);
     NTSYSAPI BOOLEAN NTAPI RtlIsEcCode(DWORD64 CodePointer);
 #endif
 #if defined (__arm__)
     NTSYSAPI PRUNTIME_FUNCTION NTAPI RtlLookupFunctionEntry (ULONG_PTR ControlPc, PDWORD ImageBase, PUNWIND_HISTORY_TABLE HistoryTable);
-    NTSYSAPI VOID NTAPI __MINGW_ATTRIB_NORETURN RtlUnwindEx (PVOID TargetFrame, PVOID TargetIp, PEXCEPTION_RECORD ExceptionRecord, PVOID ReturnValue, PCONTEXT ContextRecord, PUNWIND_HISTORY_TABLE HistoryTable);
+    NTSYSAPI VOID NTAPI RtlUnwindEx (PVOID TargetFrame, PVOID TargetIp, PEXCEPTION_RECORD ExceptionRecord, PVOID ReturnValue, PCONTEXT ContextRecord, PUNWIND_HISTORY_TABLE HistoryTable);
     NTSYSAPI PEXCEPTION_ROUTINE NTAPI RtlVirtualUnwind (DWORD HandlerType, DWORD ImageBase, DWORD ControlPc, PRUNTIME_FUNCTION FunctionEntry, PCONTEXT ContextRecord, PVOID *HandlerData, PDWORD EstablisherFrame, PKNONVOLATILE_CONTEXT_POINTERS ContextPointers);
 #endif
 #if defined (__aarch64__)
     NTSYSAPI PRUNTIME_FUNCTION NTAPI RtlLookupFunctionEntry (ULONG_PTR ControlPc, PULONG_PTR ImageBase, PUNWIND_HISTORY_TABLE HistoryTable);
-    NTSYSAPI VOID NTAPI __MINGW_ATTRIB_NORETURN RtlUnwindEx (PVOID TargetFrame, PVOID TargetIp, PEXCEPTION_RECORD ExceptionRecord, PVOID ReturnValue, PCONTEXT ContextRecord, PUNWIND_HISTORY_TABLE HistoryTable);
+    NTSYSAPI VOID NTAPI RtlUnwindEx (PVOID TargetFrame, PVOID TargetIp, PEXCEPTION_RECORD ExceptionRecord, PVOID ReturnValue, PCONTEXT ContextRecord, PUNWIND_HISTORY_TABLE HistoryTable);
     NTSYSAPI PEXCEPTION_ROUTINE NTAPI RtlVirtualUnwind (DWORD HandlerType, ULONG_PTR ImageBase, ULONG_PTR ControlPc, PRUNTIME_FUNCTION FunctionEntry, PCONTEXT ContextRecord, PVOID *HandlerData, PULONG_PTR EstablisherFrame, PKNONVOLATILE_CONTEXT_POINTERS ContextPointers);
 #endif
 #if defined (__ia64__)
     NTSYSAPI PRUNTIME_FUNCTION NTAPI RtlLookupFunctionEntry (ULONGLONG ControlPc, PULONGLONG ImageBase, PULONGLONG TargetGp);
-    NTSYSAPI VOID NTAPI __MINGW_ATTRIB_NORETURN RtlUnwindEx (FRAME_POINTERS TargetFrame, PVOID TargetIp, PEXCEPTION_RECORD ExceptionRecord, PVOID ReturnValue, PCONTEXT ContextRecord, PUNWIND_HISTORY_TABLE HistoryTable);
+    NTSYSAPI VOID NTAPI RtlUnwindEx (FRAME_POINTERS TargetFrame, PVOID TargetIp, PEXCEPTION_RECORD ExceptionRecord, PVOID ReturnValue, PCONTEXT ContextRecord, PUNWIND_HISTORY_TABLE HistoryTable);
     NTSYSAPI ULONGLONG NTAPI RtlVirtualUnwind (ULONGLONG ImageBase, ULONGLONG ControlPc, PRUNTIME_FUNCTION FunctionEntry, PCONTEXT ContextRecord, PBOOLEAN InFunction, PFRAME_POINTERS EstablisherFrame, PKNONVOLATILE_CONTEXT_POINTERS ContextPointers);
 #endif
 #endif