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diff --git a/CMakeLists.txt b/CMakeLists.txt
index 46446da8a..a3d8cd98f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -116,6 +116,7 @@ if (CGNS_ENABLE_LFS)
else ()
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 ()
if (HAVE_OPEN64)
add_compile_definitions(HAVE_OPEN64)
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