diff --git a/lib/std/debug/cpu_context.zig b/lib/std/debug/cpu_context.zig
index 7b8ddaba805e31cd7877a517a6844a94ee2c3f34..07bb43a4fa2997a61ea5b2286132de2c427ce648 100644
--- a/lib/std/debug/cpu_context.zig
+++ b/lib/std/debug/cpu_context.zig
@@ -1768,7 +1768,7 @@ const X86_16 = struct {
         switch (register_num) {
             4 => return @ptrCast(ctx.regs.getPtr(.sp)),
             5 => return @ptrCast(ctx.regs.getPtr(.bp)),
-            6 => return @ptrCast(ctx.regs.getPtr(.ip)),
+            8 => return @ptrCast(ctx.regs.getPtr(.ip)),
             41 => return @ptrCast(ctx.regs.getPtr(.cs)),
             42 => return @ptrCast(ctx.regs.getPtr(.ss)),
             else => return error.InvalidRegister,