diff --git a/CMakeLists.txt b/CMakeLists.txt
index 20eaa9e1..74bc1a93 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -216,12 +216,12 @@ if(ZLIB_BUILD_EXAMPLES)
 
     if(HAVE_OFF64_T)
         add_executable(zlib_example64 test/example.c)
+        target_compile_definitions(zlib_example64 PRIVATE LARGEFILE64_SOURCE=1)
         target_link_libraries(zlib_example64 zlib)
-        set_target_properties(zlib_example64 PROPERTIES COMPILE_FLAGS "-D_FILE_OFFSET_BITS=64")
         add_test(zlib_example64 zlib_example64)
 
         add_executable(minigzip64 test/minigzip.c)
+        target_compile_definitions(minigzip64 PRIVATE LARGEFILE64_SOURCE=1)
         target_link_libraries(minigzip64 zlib)
-        set_target_properties(minigzip64 PROPERTIES COMPILE_FLAGS "-D_FILE_OFFSET_BITS=64")
     endif()
 endif()