diff --git a/lib/std/debug/cpu_context.zig b/lib/std/debug/cpu_context.zig
index a1b530a9b19f2233e5f5efa9e3b2f408c52f703c..6f6a07a86ffc0a867da5534b440966e6f12451bc 100644
--- a/lib/std/debug/cpu_context.zig
+++ b/lib/std/debug/cpu_context.zig
@@ -350,7 +350,7 @@ const Alpha = extern struct {
             \\1:
             \\ stq $1, 0x100($0)
             :
-            : [ctx] "{r0}" (&ctx),
+            : [ctx] "{$0}" (&ctx),
             : .{ .r1 = true, .memory = true });
         return ctx;
     }
@@ -362,7 +362,7 @@ const Alpha = extern struct {
         return ctx.pc;
     }
 
-    pub fn dwarfRegisterBytes(ctx: *Aarch64, register_num: u16) DwarfRegisterError![]u8 {
+    pub fn dwarfRegisterBytes(ctx: *Alpha, register_num: u16) DwarfRegisterError![]u8 {
         switch (register_num) {
             0...31 => return @ptrCast(&ctx.r[register_num]),
             64 => return @ptrCast(&ctx.pc),