diff --git a/tests/Makefile.am.tpl b/tests/Makefile.am.tpl
index 0b9ae4c..06d48c1 100644
--- a/tests/Makefile.am.tpl
+++ b/tests/Makefile.am.tpl
@@ -6,3 +6,7 @@ AM_CPPFLAGS += -I $(top_srcdir)/crypto/asn1
 TESTS =
 check_PROGRAMS =
 EXTRA_DIST =
+
+if !NO_ARC4RANDOM_BUF
+TESTS += pidwraptest.sh
+endif
diff --git a/tests/pidwraptest.c b/tests/pidwraptest.c
index 75f2cc2..7eb2a0c 100644
--- a/tests/pidwraptest.c
+++ b/tests/pidwraptest.c
@@ -1,6 +1,9 @@
 /*
- * Checks if LibreSSL's PRNG is fork-safe on Linux.
+ * Checks if LibreSSL's PRNG is fork-safe.
  * From https://www.agwa.name/blog/post/libressls_prng_is_unsafe_on_linux
+ * This code is in the public domain.
+ *
+ * Original source: https://gist.github.com/AGWA/eb84e55ca25a7da1deb0
  */
 
 #include <openssl/rand.h>