diff --git a/crypto/hash/empty.go b/crypto/hash/empty.go
new file mode 100644
index 00000000000..7adc22fef06
--- /dev/null
+++ b/crypto/hash/empty.go
@@ -0,0 +1 @@
+package hash
diff --git a/crypto/random/empty.go b/crypto/random/empty.go
new file mode 100644
index 00000000000..eeab28a038e
--- /dev/null
+++ b/crypto/random/empty.go
@@ -0,0 +1 @@
+package random