diff --git a/reactos/dll/ntdll/def/ntdll.spec b/reactos/dll/ntdll/def/ntdll.spec
index b9d3a3016aa..d212ecffc45 100644
--- a/reactos/dll/ntdll/def/ntdll.spec
+++ b/reactos/dll/ntdll/def/ntdll.spec
@@ -442,7 +442,7 @@
 @ stdcall RtlAddVectoredExceptionHandler(long ptr)
 ;@ stdcall RtlAddressInSectionTable
 @ stdcall RtlAdjustPrivilege(long long long ptr)
-@ stdcall RtlAllocateActivationContextStack(ptr) ; CHEKME
+@ stdcall RtlAllocateActivationContextStack(ptr) ; CHECKME
 @ stdcall RtlAllocateAndInitializeSid(ptr long long long long long long long long long ptr)
 @ stdcall RtlAllocateHandle(ptr ptr)
 @ stdcall RtlAllocateHeap(ptr long ptr)
@@ -635,7 +635,7 @@
 @ stdcall RtlFormatCurrentUserKeyPath(ptr)
 @ stdcall RtlFormatMessage(ptr long long long long ptr ptr long)
 ;@ stdcall RtlFormatMessageEx
-;@ stdcall RtlFreeActivationContextStack
+@ stdcall RtlFreeActivationContextStack(ptr)
 @ stdcall RtlFreeAnsiString(long)
 @ stdcall RtlFreeHandle(ptr ptr)
 @ stdcall RtlFreeHeap(long long long)
diff --git a/reactos/include/ndk/rtlfuncs.h b/reactos/include/ndk/rtlfuncs.h
index 46e180e2669..cf2ee8541cc 100644
--- a/reactos/include/ndk/rtlfuncs.h
+++ b/reactos/include/ndk/rtlfuncs.h
@@ -3539,7 +3539,14 @@ RtlDeactivateActivationContext(
 NTSYSAPI
 VOID
 NTAPI
-RtlFreeThreadActivationContextStack(void);
+RtlFreeActivationContextStack(
+    _In_ PACTIVATION_CONTEXT_STACK Stack
+);
+
+NTSYSAPI
+VOID
+NTAPI
+RtlFreeThreadActivationContextStack(VOID);
 
 NTSYSAPI
 PRTL_ACTIVATION_CONTEXT_STACK_FRAME
diff --git a/reactos/lib/rtl/actctx.c b/reactos/lib/rtl/actctx.c
index e08034aa5be..bdd371e63df 100644
--- a/reactos/lib/rtl/actctx.c
+++ b/reactos/lib/rtl/actctx.c
@@ -2459,7 +2459,7 @@ RtlFreeActivationContextStack(PACTIVATION_CONTEXT_STACK Stack)
 }
 
 VOID
-NTAPI RtlFreeThreadActivationContextStack(void)
+NTAPI RtlFreeThreadActivationContextStack(VOID)
 {
     RtlFreeActivationContextStack(NtCurrentTeb()->ActivationContextStackPointer);
     NtCurrentTeb()->ActivationContextStackPointer = NULL;