diff --git a/CMakeLists.txt b/CMakeLists.txt
index 42aa50dea..33d5357cc 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -161,6 +161,8 @@ endif( NO_BUILTIN )
 include(TestBigEndian)
 test_big_endian(WORDS_BIGENDIAN)
 
+tde_setup_largefiles( )
+
 tde_save_and_set( CMAKE_REQUIRED_INCLUDES ${CMAKE_SOURCE_DIR}/libltdl )
 check_include_file( "ltdl.h" HAVE_LTDL_H )
 if( NOT HAVE_LTDL_H )
diff --git a/tdeio/CMakeLists.txt b/tdeio/CMakeLists.txt
index 0762a056f..c59b8a39d 100644
--- a/tdeio/CMakeLists.txt
+++ b/tdeio/CMakeLists.txt
@@ -9,10 +9,6 @@
 #
 #################################################
 
-add_definitions(
-  -D_LARGEFILE64_SOURCE=1
-)
-
 add_subdirectory( kssl )
 add_subdirectory( tdeio )
 add_subdirectory( bookmarks )
diff --git a/tdeio/misc/CMakeLists.txt b/tdeio/misc/CMakeLists.txt
index 64004dbcc..fc145ee87 100644
--- a/tdeio/misc/CMakeLists.txt
+++ b/tdeio/misc/CMakeLists.txt
@@ -17,10 +17,6 @@ add_subdirectory( tdefile )
 add_subdirectory( tdewalletd )
 add_subdirectory( tdentlm )
 
-add_definitions(
-  -D_LARGEFILE64_SOURCE
-)
-
 include_directories(
   ${TQT_INCLUDE_DIRS}
   ${CMAKE_CURRENT_BINARY_DIR}
diff --git a/tdeioslave/file/CMakeLists.txt b/tdeioslave/file/CMakeLists.txt
index 287e1ebe2..b9e4904b2 100644
--- a/tdeioslave/file/CMakeLists.txt
+++ b/tdeioslave/file/CMakeLists.txt
@@ -9,10 +9,6 @@
 #
 #################################################
 
-add_definitions(
-  -D_LARGEFILE64_SOURCE
-)
-
 include_directories(
   ${TQT_INCLUDE_DIRS}
   ${CMAKE_CURRENT_BINARY_DIR}