diff --git a/lib/std/debug/SelfInfo/MachO.zig b/lib/std/debug/SelfInfo/MachO.zig
index 59b9a524b01d4f68d5b8854d1b64d70bbb4fba9f..f68572d1ca07fab3f0a9249f1bdf42c85ba9ee2e 100644
--- a/lib/std/debug/SelfInfo/MachO.zig
+++ b/lib/std/debug/SelfInfo/MachO.zig
@@ -426,10 +426,10 @@ fn unwindFrameInner(si: *SelfInfo, io: Io, context: *UnwindContext) !usize {
                 var reg_addr = fp - @sizeOf(usize);
                 inline for (@typeInfo(@TypeOf(frame.x_reg_pairs)).@"struct".field_names, 0..) |field_name, i| {
                     if (@field(frame.x_reg_pairs, field_name) != 0) {
-                        (try dwarfRegNative(&context.cpu_state, 19 + i)).* = @as(*const usize, @ptrFromInt(reg_addr)).*;
-                        reg_addr += @sizeOf(usize);
-                        (try dwarfRegNative(&context.cpu_state, 20 + i)).* = @as(*const usize, @ptrFromInt(reg_addr)).*;
-                        reg_addr += @sizeOf(usize);
+                        (try dwarfRegNative(&context.cpu_state, 19 + i * 2)).* = @as(*const usize, @ptrFromInt(reg_addr)).*;
+                        reg_addr -= @sizeOf(usize);
+                        (try dwarfRegNative(&context.cpu_state, 20 + i * 2)).* = @as(*const usize, @ptrFromInt(reg_addr)).*;
+                        reg_addr -= @sizeOf(usize);
                     }
                 }
 
@@ -437,7 +437,7 @@ fn unwindFrameInner(si: *SelfInfo, io: Io, context: *UnwindContext) !usize {
                 // vector registers in the AArch64 `cpu_context` anyway, so there's no reason to
                 // fail a legitimate unwind just because we're asked to restore the registers here.
                 // If some weird/broken unwind info tells us to read them later, we will fail then.
-                reg_addr += 16 * @as(usize, @popCount(@as(u4, @bitCast(frame.d_reg_pairs))));
+                reg_addr -= 16 * @as(usize, @popCount(@as(u4, @bitCast(frame.d_reg_pairs))));
 
                 const new_ip = @as(*const usize, @ptrFromInt(ip_ptr)).*;
                 const new_fp = @as(*const usize, @ptrFromInt(fp)).*;