diff --git a/src/subprocess.zig b/src/subprocess.zig
index d7bddf0..7a2ee03 100644
--- a/src/subprocess.zig
+++ b/src/subprocess.zig
@@ -145,9 +145,9 @@ const Proc = struct {
 
     fn receive(self: *Proc, _: tp.pid_ref, m: tp.message) tp.result {
         errdefer self.deinit();
-        var bytes: []u8 = "";
+        var bytes: []const u8 = "";
         var err: i64 = 0;
-        var err_msg: []u8 = "";
+        var err_msg: []const u8 = "";
         if (try m.match(.{ "fd", "stdout", "read_ready" })) {
             try self.dispatch_stdout();
             if (self.fd_stdout) |fd_stdout| fd_stdout.wait_read() catch |e| return self.handle_error(e);
diff --git a/src/thespian.zig b/src/thespian.zig
index 7a476b5..136937d 100644
--- a/src/thespian.zig
+++ b/src/thespian.zig
@@ -499,14 +499,14 @@ fn log_last_error(err: anytype) @TypeOf(err) {
 fn exitHandlerRun(comptime T: type) c.thespian_exit_handler {
     if (T == @TypeOf(null)) return null;
     return switch (@typeInfo(T)) {
-        .Optional => |info| switch (@typeInfo(info.child)) {
-            .Pointer => |ptr_info| switch (ptr_info.size) {
-                .One => ptr_info.child.run,
+        .optional => |info| switch (@typeInfo(info.child)) {
+            .pointer => |ptr_info| switch (ptr_info.size) {
+                .one => ptr_info.child.run,
                 else => @compileError("expected single item pointer, found: '" ++ @typeName(T) ++ "'"),
             },
         },
-        .Pointer => |ptr_info| switch (ptr_info.size) {
-            .One => ptr_info.child.run,
+        .pointer => |ptr_info| switch (ptr_info.size) {
+            .one => ptr_info.child.run,
             else => @compileError("expected single item pointer, found: '" ++ @typeName(T) ++ "'"),
         },
         else => @compileError("expected optional pointer or pointer type, found: '" ++ @typeName(T) ++ "'"),
@@ -515,8 +515,8 @@ fn exitHandlerRun(comptime T: type) c.thespian_exit_handler {
 
 pub fn receive(r: anytype) void {
     const T = switch (@typeInfo(@TypeOf(r))) {
-        .Pointer => |ptr_info| switch (ptr_info.size) {
-            .One => ptr_info.child,
+        .pointer => |ptr_info| switch (ptr_info.size) {
+            .one => ptr_info.child,
             else => @compileError("invalid receiver type"),
         },
         else => @compileError("invalid receiver type"),