--- a/cmake/modules/SetKDbCMakePolicies.cmake
+++ b/cmake/modules/SetKDbCMakePolicies.cmake
@@ -8,9 +8,6 @@ cmake_policy(SET CMP0048 NEW) # for PROJ
 cmake_policy(SET CMP0053 NEW) # TODO remove, temporary fix for a bug in Qt 5.8's Qt5ModuleLocation.cmake
                               # "Simplify variable reference and escape sequence evaluation"
 
-if(POLICY CMP0059) # Don’t treat DEFINITIONS as a built-in directory property.
-    cmake_policy(SET CMP0059 OLD)
-endif()
 if(POLICY CMP0063) # Honor visibility properties for all target types (since cmake 3.3)
     cmake_policy(SET CMP0063 NEW)
 endif()
