diff --git a/lib/kunit/string-stream-test.c b/lib/kunit/string-stream-test.c
index 7511442ea98f..7734e33156f9 100644
--- a/lib/kunit/string-stream-test.c
+++ b/lib/kunit/string-stream-test.c
@@ -9,6 +9,7 @@
 #include <kunit/static_stub.h>
 #include <kunit/test.h>
 #include <linux/ktime.h>
+#include <linux/prandom.h>
 #include <linux/slab.h>
 #include <linux/timekeeping.h>