diff --git a/package/base/coreutils/coreutils.conf b/package/base/coreutils/coreutils.conf
index 9abde69f6..59b6bd130 100644
--- a/package/base/coreutils/coreutils.conf
+++ b/package/base/coreutils/coreutils.conf
@@ -68,3 +68,7 @@ var_append flist''del '|' "usr/lib/charset.alias"
 var_append INSTALL_WRAPPER_FILTER "|" "sed -r 's,.*/share/man/.*/(uptime|groups|hostname|kill|su).1\$,$builddir/dummy,'"
 var_append INSTALL_WRAPPER_FILTER "|" "sed -r 's,.*/bin/(uptime|groups|hostname|kill|su)\$,$builddir/dummy,'"
 
+# allow c99 keywords (such as 'resticted' in coreutils-5.94/lib/time_r.h)
+var_append CFLAGS " " "-std=c99"
+export CFLAGS
+