diff --git a/ly-core/src/interop.zig b/ly-core/src/interop.zig
index e09f932..6a9a6de 100644
--- a/ly-core/src/interop.zig
+++ b/ly-core/src/interop.zig
@@ -279,11 +279,11 @@ const platform_struct = PlatformStruct();
 
 // TODO 0.16.0: Can we get away with this?
 pub fn isError(result: anytype) bool {
-    if (@TypeOf(result) == c_int) {
+    if (@typeInfo(@TypeOf(result)).int.signedness == .signed) {
         return result < 0;
     }
 
-    if (@TypeOf(result) == usize) {
+    if (@typeInfo(@TypeOf(result)).int.signedness == .unsigned) {
         return switch (builtin.os.tag) {
             .linux => std.os.linux.errno(result) != .SUCCESS,
             else => @compileError("interop.isError() not implemented for current target!"),
diff --git a/src/auth.zig b/src/auth.zig
index 964f4a1..77621da 100644
--- a/src/auth.zig
+++ b/src/auth.zig
@@ -471,7 +471,6 @@ fn executeX11Cmd(log_file: *LogFile, allocator: std.mem.Allocator, io: std.Io, s
     while (ok != 0) {
         xcb = interop.xcb.xcb_connect(null, null);
         ok = interop.xcb.xcb_connection_has_error(xcb);
-        // TODO 0.16.0: Does this work?
         std.posix.kill(pid, @enumFromInt(0)) catch |e| {
             if (e == error.ProcessNotFound and ok != 0) return error.XcbConnectionFailed;
         };
diff --git a/src/main.zig b/src/main.zig
index ea93655..34a7142 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -2263,7 +2263,6 @@ fn getBatteryPercentage(io: std.Io, battery_id: []const u8) !u8 {
     defer battery_file.close(io);
 
     var buffer: [8]u8 = undefined;
-    // TODO 0.16.0: Check if that works
     const bytes_read = try battery_file.readStreaming(io, &.{&buffer});
     const capacity_str = buffer[0..bytes_read];