diff --git a/subprocess.hpp b/subprocess.hpp
index 24fa303..6a760b8 100755
--- a/subprocess.hpp
+++ b/subprocess.hpp
@@ -1057,7 +1057,10 @@ class Communication
 public:
   Communication(Streams* stream): stream_(stream)
   {}
-  void operator=(const Communication&) = delete;
+  Communication(const Communication&) = delete;
+  Communication& operator=(const Communication&) = delete;
+  Communication(Communication&&) = default;
+  Communication& operator=(Communication&&) = default;
 public:
   int send(const char* msg, size_t length);
   int send(const std::vector<char>& msg);
@@ -1094,7 +1097,10 @@ class Streams
 {
 public:
   Streams():comm_(this) {}
-  void operator=(const Streams&) = delete;
+  Streams(const Streams&) = delete;
+  Streams& operator=(const Streams&) = delete;
+  Streams(Streams&&) = default;
+  Streams& operator=(Streams&&) = default;
 
 public:
   void setup_comm_channels();