diff --git a/cmake/LYWrappers.cmake b/cmake/LYWrappers.cmake
index e4398099d1..1a8e805f91 100644
--- a/cmake/LYWrappers.cmake
+++ b/cmake/LYWrappers.cmake
@@ -6,7 +6,7 @@
 #
 #
 
-set(LY_UNITY_BUILD OFF CACHE BOOL "UNITY builds")
+set(LY_UNITY_BUILD ON CACHE BOOL "UNITY builds")
 
 include(CMakeFindDependencyMacro)
 include(cmake/LyAutoGen.cmake)