diff --git a/xtoskrnl/xtoskrnl.spec b/xtoskrnl/xtoskrnl.spec
index ff19369..5ffc347 100644
--- a/xtoskrnl/xtoskrnl.spec
+++ b/xtoskrnl/xtoskrnl.spec
@@ -1,5 +1,9 @@
-@ stdcall HlIoPortInByte(ptr)
-@ stdcall HlIoPortOutByte(ptr long)
+@ cdecl HlIoPortInByte(ptr)
+@ cdecl HlIoPortInLong(ptr)
+@ cdecl HlIoPortInShort(ptr)
+@ cdecl HlIoPortOutByte(ptr long)
+@ cdecl HlIoPortOutLong(ptr long)
+@ cdecl HlIoPortOutShort(ptr long)
 @ stdcall RtlCompareMemory(ptr ptr long)
 @ stdcall RtlCopyMemory(ptr ptr long)
 @ stdcall RtlFillMemory(ptr long long)