diff --git a/dist/tools/genconfigheader/genconfigheader.sh b/dist/tools/genconfigheader/genconfigheader.sh
index 0d17d48d74c84b5282e33d9245a5871077f7579c..247387a3bed0de1a4ecab7f5b86a8cf5e4a0cc37 100755
--- a/dist/tools/genconfigheader/genconfigheader.sh
+++ b/dist/tools/genconfigheader/genconfigheader.sh
@@ -42,6 +42,9 @@ set -e
 
 echo "/* DO NOT edit this file, your changes will be overwritten and won't take any effect! */" > "${TMPFILE}"
 echo "/* Generated from CFLAGS: $@ */" >> "${TMPFILE}"
+
+[ -n "${LTOFLAGS}" ] && echo "/* LTOFLAGS=${LTOFLAGS} */" >> "${TMPFILE}"
+
 for arg in "$@"; do
   case ${arg} in
     -D*)