diff --git a/library/std/src/sys/windows/c.rs b/library/std/src/sys/windows/c.rs
index 6a088b91b514..33de486c309b 100644
--- a/library/std/src/sys/windows/c.rs
+++ b/library/std/src/sys/windows/c.rs
@@ -31,6 +31,8 @@ pub type WORD = u16;
 pub type CHAR = c_char;
 pub type ULONG_PTR = usize;
 pub type ULONG = c_ulong;
+pub type NTSTATUS = LONG;
+pub type ACCESS_MASK = DWORD;
 
 pub type LPBOOL = *mut BOOL;
 pub type LPBYTE = *mut BYTE;
@@ -286,6 +288,8 @@ pub const STACK_SIZE_PARAM_IS_A_RESERVATION: DWORD = 0x00010000;
 
 pub const HEAP_ZERO_MEMORY: DWORD = 0x00000008;
 
+pub const STATUS_SUCCESS: NTSTATUS = 0x00000000;
+
 #[repr(C)]
 #[cfg(not(target_pointer_width = "64"))]
 pub struct WSADATA {
@@ -1111,3 +1115,31 @@ compat_fn! {
         // WaitOnAddress would've panicked. So it's fine to do nothing here.
     }
 }
+
+compat_fn! {
+    "ntdll":
+    pub fn NtCreateKeyedEvent(
+        KeyedEventHandle: LPHANDLE,
+        DesiredAccess: ACCESS_MASK,
+        ObjectAttributes: LPVOID,
+        Flags: ULONG
+    ) -> NTSTATUS {
+        panic!("keyed events not available")
+    }
+    pub fn NtReleaseKeyedEvent(
+        EventHandle: HANDLE,
+        Key: LPVOID,
+        Alertable: BOOLEAN,
+        Timeout: PLARGE_INTEGER
+    ) -> NTSTATUS {
+        panic!("keyed events not available")
+    }
+    pub fn NtWaitForKeyedEvent(
+        EventHandle: HANDLE,
+        Key: LPVOID,
+        Alertable: BOOLEAN,
+        Timeout: PLARGE_INTEGER
+    ) -> NTSTATUS {
+        panic!("keyed events not available")
+    }
+}