diff --git a/src/config/Config.zig b/src/config/Config.zig
index b7a9699c8..2e21b9272 100644
--- a/src/config/Config.zig
+++ b/src/config/Config.zig
@@ -2884,7 +2884,7 @@ keybind: Keybinds = .{},
 ///
 /// Note: This configuration is required when `macos-icon` is set to
 /// `custom`
-@"macos-custom-icon": ?[]const u8 = null,
+@"macos-custom-icon": ?[:0]const u8 = null,
 
 /// The material to use for the frame of the macOS app icon.
 ///