# Compilation error while migration from 4.26.2 to 4.27.0

**URL:** <https://forums.unrealengine.com/t/compilation-error-while-migration-from-4-26-2-to-4-27-0/487863>\
**Category:** Platform & Builds\
**Tags:** error, engine-compile, unreal-engine, question\
**Created:** [August 23, 2021, 9:38pm UTC](https://forums.unrealengine.com/t/compilation-error-while-migration-from-4-26-2-to-4-27-0/487863 "2021-08-23T21:38:40Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![BIBALLO1](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@BIBALLO1](https://forums.unrealengine.com/u/BIBALLO1)\
**Post date:** [September 4, 2021, 2:22pm UTC](https://forums.unrealengine.com/t/compilation-error-while-migration-from-4-26-2-to-4-27-0/487863/3 "2021-09-04T14:22:18Z")

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I’m having the same problem, where did you add the #define?

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