diff --git a/samples/moxie-unknown-moxiebox/crosstool.config b/samples/moxie-unknown-moxiebox/crosstool.config
index fe08882d..755e4d83 100644
--- a/samples/moxie-unknown-moxiebox/crosstool.config
+++ b/samples/moxie-unknown-moxiebox/crosstool.config
@@ -2,6 +2,7 @@ CT_CONFIG_VERSION="4"
 CT_EXPERIMENTAL=y
 CT_ARCH_MOXIE=y
 CT_ARCH_LE=y
+CT_NEWLIB_V_4_2=y
 CT_DEBUG_GDB=y
 CT_GDB_CROSS_SIM=y
 # CT_GDB_CROSS_PYTHON is not set