diff --git a/lib/std/os/windows.zig b/lib/std/os/windows.zig
index 018f214144..77bd8ea2f4 100644
--- a/lib/std/os/windows.zig
+++ b/lib/std/os/windows.zig
@@ -5315,6 +5315,9 @@ pub const PF = enum(DWORD) {
 
     /// This ARM processor implements the ARM v8.3 JavaScript conversion (JSCVT) instructions.
     ARM_V83_JSCVT_INSTRUCTIONS_AVAILABLE = 44,
+
+    /// This Arm processor implements the Arm v8.3 LRCPC instructions (for example, LDAPR). Note that certain Arm v8.2 CPUs may optionally support the LRCPC instructions.
+    ARM_V83_LRCPC_INSTRUCTIONS_AVAILABLE,
 };
 
 pub const MAX_WOW64_SHARED_ENTRIES = 16;