diff --git a/sys/random/prng_tinymt32.c b/sys/random/prng_tinymt32.c
index 64752b741..d40e9b6e4 100644
--- a/sys/random/prng_tinymt32.c
+++ b/sys/random/prng_tinymt32.c
@@ -34,3 +34,8 @@ uint32_t random_uint32(void)
 {
     return tinymt32_generate_uint32(&_random);
 }
+
+void random_init_by_array(uint32_t init_key[], int key_length)
+{
+    tinymt32_init_by_array(&_random, init_key, key_length);
+}