diff --git a/kde-modules/KDEInstallDirs.cmake b/kde-modules/KDEInstallDirs.cmake
index 275fd65..a04596c 100644
--- a/kde-modules/KDEInstallDirs.cmake
+++ b/kde-modules/KDEInstallDirs.cmake
@@ -232,34 +232,6 @@
 # GNUInstallDirs code deals with re-configuring, but that is dealt with
 # by the _define_* macros in this module).
 set(_LIBDIR_DEFAULT "lib")
-# Override this default 'lib' with 'lib64' iff:
-#  - we are on a Linux, kFreeBSD or Hurd system but NOT cross-compiling
-#  - we are NOT on debian
-#  - we are NOT on flatpak
-#  - we are on a 64 bits system
-# reason is: amd64 ABI: http://www.x86-64.org/documentation/abi.pdf
-# For Debian with multiarch, use 'lib/${CMAKE_LIBRARY_ARCHITECTURE}' if
-# CMAKE_LIBRARY_ARCHITECTURE is set (which contains e.g. "i386-linux-gnu"
-# See https://wiki.debian.org/Multiarch
-if((CMAKE_SYSTEM_NAME MATCHES "Linux|kFreeBSD" OR CMAKE_SYSTEM_NAME STREQUAL "GNU")
-   AND NOT CMAKE_CROSSCOMPILING
-   AND NOT DEFINED ENV{FLATPAK_ID})
-  if (EXISTS "/etc/debian_version") # is this a debian system ?
-    if(CMAKE_LIBRARY_ARCHITECTURE)
-      set(_LIBDIR_DEFAULT "lib/${CMAKE_LIBRARY_ARCHITECTURE}")
-    endif()
-  else() # not debian, rely on CMAKE_SIZEOF_VOID_P:
-    if(NOT DEFINED CMAKE_SIZEOF_VOID_P)
-      message(AUTHOR_WARNING
-        "Unable to determine default LIB_INSTALL_LIBDIR directory because no target architecture is known. "
-        "Please enable at least one language before including KDEInstallDirs.")
-    else()
-      if("${CMAKE_SIZEOF_VOID_P}" EQUAL "8")
-        set(_LIBDIR_DEFAULT "lib64")
-      endif()
-    endif()
-  endif()
-endif()
 
 set(_gnu_install_dirs_vars
     BINDIR