diff --git a/CMakeLists.txt b/CMakeLists.txt
index 46446da8a..a3d8cd98f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -82,6 +82,7 @@ if (CGNS_ENABLE_LFS)
   else (WIN32)
     check_symbol_exists(open64 "sys/types.h;sys/stat.h;unistd.h" HAVE_OPEN64)
     check_symbol_exists(lseek64 "sys/types.h;unistd.h" HAVE_LSEEK64)
+    add_definitions(-D_FILE_OFFSET_BITS=64 -D__LARGEFILE64_SOURCE -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE)
   endif (WIN32)
   if (HAVE_OPEN64)
     add_definitions(-DHAVE_OPEN64)