diff --git a/dll/ntdll/def/ntdll.spec b/dll/ntdll/def/ntdll.spec
index 94dd49a5d71..da5e3614322 100644
--- a/dll/ntdll/def/ntdll.spec
+++ b/dll/ntdll/def/ntdll.spec
@@ -7,9 +7,9 @@
 @ fastcall -arch=i386 RtlUlongByteSwap(long)
 @ fastcall -ret64 RtlUlonglongByteSwap(double)
 @ fastcall -arch=i386 RtlUshortByteSwap(long)
-@ stdcall -arch=i386,x86_64 ExpInterlockedPopEntrySListEnd()
-@ stdcall -arch=i386,x86_64 ExpInterlockedPopEntrySListFault()
-@ stdcall -arch=i386,x86_64 ExpInterlockedPopEntrySListResume()
+@ stdcall -arch=i386 ExpInterlockedPopEntrySListEnd()
+@ stdcall -arch=i386 ExpInterlockedPopEntrySListFault()
+@ stdcall -arch=i386 ExpInterlockedPopEntrySListResume()
 @ stdcall CsrAllocateCaptureBuffer(long long)
 @ stdcall CsrAllocateMessagePointer(ptr long ptr)
 @ stdcall CsrCaptureMessageBuffer(ptr ptr long ptr)
@@ -76,6 +76,9 @@
 @ stdcall EtwUpdateTraceW(double wstr ptr)
 @ stdcall -stub EtwpGetTraceBuffer(long long long long)
 @ stdcall -stub EtwpSetHWConfigFunction(ptr long)
+@ stdcall -arch=x86_64 ExpInterlockedPopEntrySListEnd()
+@ stdcall -arch=x86_64 ExpInterlockedPopEntrySListFault()
+@ stdcall -arch=x86_64 ExpInterlockedPopEntrySListResume()
 @ stdcall -arch=i386 KiFastSystemCall()
 @ stdcall -arch=i386 KiFastSystemCallRet()
 @ stdcall -arch=i386 KiIntSystemCall()
@@ -478,7 +481,7 @@
 @ stdcall RtlCancelTimer(ptr ptr)
 @ stdcall -register RtlCaptureContext(ptr)
 @ stdcall RtlCaptureStackBackTrace(long long ptr ptr)
-@ stdcall -stub RtlCaptureStackContext(ptr ptr ptr)
+@ stdcall -stub -arch=i386 RtlCaptureStackContext(ptr ptr ptr)
 @ stdcall RtlCharToInteger(ptr long ptr)
 @ stdcall RtlCheckForOrphanedCriticalSections(ptr)
 @ stdcall -stub RtlCheckProcessParameters(ptr ptr ptr ptr)
@@ -611,7 +614,7 @@
 @ stdcall -arch=win32 -ret64 RtlExtendedLargeIntegerDivide(double long ptr)
 @ stdcall -arch=win32 -ret64 RtlExtendedMagicDivide(double double long)
 @ stdcall RtlFillMemory(ptr long long)
-@ stdcall RtlFillMemoryUlong(ptr long long)
+@ stdcall -arch=i386 RtlFillMemoryUlong(ptr long long)
 @ stdcall RtlFinalReleaseOutOfProcessMemoryStream(ptr)
 @ stdcall RtlFindActivationContextSectionGuid(long ptr long ptr ptr)
 @ stdcall RtlFindActivationContextSectionString(long ptr long ptr ptr)
@@ -1274,10 +1277,11 @@
 @ cdecl -arch=i386 _CIsin()
 @ cdecl -arch=i386 _CIsqrt()
 @ cdecl -arch=x86_64,arm __C_specific_handler(ptr long ptr ptr)
-@ cdecl -arch=arm __jump_unwind()
+@ cdecl -arch=x86_64 __chkstk()
 @ cdecl __isascii(long)
 @ cdecl __iscsym(long)
 @ cdecl __iscsymf(long)
+@ cdecl -arch=arm __jump_unwind()
 @ cdecl __toascii(long)
 @ cdecl -arch=i386 -ret64 _alldiv(double double)
 @ cdecl -arch=i386 _alldvrm()