---
title: kUnicodeUseFallbacksMask
framework: Core Services
role: symbol
role_heading: Enumeration Case
platforms: [Mac Catalyst 17.0+, macOS 10.0+]
path: coreservices/1433493-conversion_masks/kunicodeusefallbacksmask
---

# kUnicodeUseFallbacksMask

## Declaration

```occ
kUnicodeUseFallbacksMask = 1L << kUnicodeUseFallbacksBit
```

## Discussion

Discussion A mask for setting the Unicode-use-fallbacks conversion flag. The Unicode Converter uses fallback mappings when it encounters a source text element for which there is no equivalent destination encoding. Fallback mappings are mappings that do not preserve the meaning or identity of the source character but represent a useful approximation of it. See the function SetFallbackUnicodeToText.