diff --git a/dlls/ntdll/actctx.c b/dlls/ntdll/actctx.c
index b88e6dea074..17f9cad0846 100644
--- a/dlls/ntdll/actctx.c
+++ b/dlls/ntdll/actctx.c
@@ -4942,6 +4942,8 @@ void actctx_init(void)
     ctx.lpResourceName = (LPCWSTR)CREATEPROCESS_MANIFEST_RESOURCE_ID;
 
     if (!RtlCreateActivationContext( &handle, &ctx )) process_actctx = check_actctx(handle);
+
+    NtCurrentTeb()->Peb->ActivationContextData = process_actctx;
 }