diff --git a/lib/std/os/windows/advapi32.zig b/lib/std/os/windows/advapi32.zig
index 6d7ea3f8e0..67234a26e0 100644
--- a/lib/std/os/windows/advapi32.zig
+++ b/lib/std/os/windows/advapi32.zig
@@ -21,10 +21,10 @@ pub extern "advapi32" fn RegOpenKeyExW(
 pub extern "advapi32" fn RegQueryValueExW(
     hKey: HKEY,
     lpValueName: LPCWSTR,
-    lpReserved: *DWORD,
-    lpType: *DWORD,
-    lpData: *BYTE,
-    lpcbData: *DWORD,
+    lpReserved: ?*DWORD,
+    lpType: ?*DWORD,
+    lpData: ?*BYTE,
+    lpcbData: ?*DWORD,
 ) callconv(WINAPI) LSTATUS;
 
 // RtlGenRandom is known as SystemFunction036 under advapi32