diff --git a/src-self-hosted/codegen.zig b/src-self-hosted/codegen.zig
index ccd0da8ae..73758bda8 100644
--- a/src-self-hosted/codegen.zig
+++ b/src-self-hosted/codegen.zig
@@ -54,7 +54,7 @@ pub fn generateSymbol(
                     // Prepare the function parameters
                     switch (bin_file.options.target.cpu.arch) {
                         .x86_64 => {
-                            const integer_registers = [_]Reg(.x86_64){.rdi, .rsi, .rdx, .rcx, .r8, .r9};
+                            const integer_registers = [_]Reg(.x86_64){ .rdi, .rsi, .rdx, .rcx, .r8, .r9 };
                             var next_int_reg: usize = 0;
 
                             for (param_types) |param_type, src_i| {
@@ -64,7 +64,7 @@ pub fn generateSymbol(
                                             try mc_args.append(.{ .stack_offset = next_stack_offset });
                                             next_stack_offset += param_type.abiSize(bin_file.options.target);
                                         } else {
-                                            try mc_args.append(.{ .register = @enumToInt(integer_registers[next_int_reg])});
+                                            try mc_args.append(.{ .register = @enumToInt(integer_registers[next_int_reg]) });
                                             next_int_reg += 1;
                                         }
                                     },
@@ -75,10 +75,9 @@ pub fn generateSymbol(
                                             "TODO implement function parameters of type {}",
                                             .{@tagName(param_type.zigTypeTag())},
                                         ),
-                                    }
+                                    },
                                 }
                             }
-
                         },
                         else => return Result{
                             .fail = try ErrorMsg.create(
@@ -113,7 +112,7 @@ pub fn generateSymbol(
 
             function.gen() catch |err| switch (err) {
                 error.CodegenFail => return Result{ .fail = function.err_msg.? },
-                else => |e| return e,            
+                else => |e| return e,
             };
 
             if (function.err_msg) |em| {
@@ -689,7 +688,7 @@ const Function = struct {
                 },
                 .stack_offset => |off| {
                     return self.fail(src, "TODO implement genSetReg for stack variables", .{});
-                }
+                },
             },
             else => return self.fail(src, "TODO implement genSetReg for more architectures", .{}),
         }
diff --git a/src-self-hosted/codegen/x86_64.zig b/src-self-hosted/codegen/x86_64.zig
index 8bf131dbd..ddcbd5320 100644
--- a/src-self-hosted/codegen/x86_64.zig
+++ b/src-self-hosted/codegen/x86_64.zig
@@ -67,25 +67,4 @@ pub const Register = enum(u8) {
     }
 };
 
-// zig fmt: on
-
-/// After argument values have been computed, they are placed either in registers
-/// or pushed on the stack. The way values are passed depends on the class.
-pub const ParameterClass = enum {
-    /// Integral types that fit into one of the general purpose registers.
-    integer,
-    /// Types that fit into a vector register.
-    sse,
-    /// Types that fit into a vector register and can be passed
-    /// and returned in the upper bytes of it.
-    sse_up,
-    /// Types  that  will  be  returned  via  the  x87FPU.
-    x87,
-    /// Types  that  will  be  returned  via  the  x87FPU and can be passed and returned
-    /// in the upper bytes of it.
-    x87_up,
-    /// Types that will be returned via the x87FPU.
-    complex_x87,
-    /// Types that will be passed and returned in mem-ory via the stack.
-    memory,
-};
+// zig fmt: on
\ No newline at end of file