diff --git a/dkarm-eabi/scripts/build-gcc.sh b/dkarm-eabi/scripts/build-gcc.sh
index 70a9760..4415fc6 100755
--- a/dkarm-eabi/scripts/build-gcc.sh
+++ b/dkarm-eabi/scripts/build-gcc.sh
@@ -88,6 +88,8 @@ then
 	--disable-newlib-supplied-syscalls \
 	--enable-newlib-mb \
 	--enable-newlib-io-long-long \
+	--enable-newlib-io-c99 \
+	--enable-newlib-io-pos-args \
 	--target=$target \
 	--prefix=$prefix \
 	|| { echo "Error configuring newlib"; exit 1; }