diff --git a/dist/tools/uncrustify/whitelist.txt b/dist/tools/uncrustify/whitelist.txt
index 2962dcca2d..523ff0b841 100644
--- a/dist/tools/uncrustify/whitelist.txt
+++ b/dist/tools/uncrustify/whitelist.txt
@@ -1,2 +1,5 @@
 core/.*\.c
 core/include/.*\.h
+sys/ztimer/.*\.c
+sys/ztimer.h
+sys/include/ztimer/.*\.h