diff --git a/samples/xtensa-fsf-elf/crosstool.config b/samples/xtensa-fsf-elf/crosstool.config
index a13c4779..b88c039f 100644
--- a/samples/xtensa-fsf-elf/crosstool.config
+++ b/samples/xtensa-fsf-elf/crosstool.config
@@ -16,6 +16,7 @@ CT_NEWLIB_DEVEL_URL="https://github.com/espressif/newlib-esp32.git"
 CT_NEWLIB_DEVEL_REVISION="fdbb7b81"
 CT_LIBC_NEWLIB_TARGET_CFLAGS="-DSIGNAL_PROVIDED -DABORT_PROVIDED -DMALLOC_PROVIDED"
 CT_LIBC_NEWLIB_DISABLE_SUPPLIED_SYSCALLS=y
+# CT_LIBC_NEWLIB_GLOBAL_ATEXIT is not set
 CT_GCC_SRC_DEVEL=y
 CT_GCC_DEVEL_VCS_git=y
 CT_GCC_DEVEL_URL="https://github.com/espressif/gcc.git"