diff --git a/ctaocrypt/test/test.c b/ctaocrypt/test/test.c
index e1ca24a27..d85d30f87 100644
--- a/ctaocrypt/test/test.c
+++ b/ctaocrypt/test/test.c
@@ -3954,6 +3954,10 @@ int dh_test(void)
     FreeDhKey(&key);
     FreeDhKey(&key2);
 
+#if defined(HAVE_HASHDRBG) || defined(NO_RC4)
+    FreeRng(&rng);
+#endif
+
     return 0;
 }