diff --git a/fairmq/FairMQChannel.cxx b/fairmq/FairMQChannel.cxx
index 4ac4349a..52e3687f 100644
--- a/fairmq/FairMQChannel.cxx
+++ b/fairmq/FairMQChannel.cxx
@@ -27,6 +27,22 @@ T GetPropertyOrDefault(const fair::mq::Properties& m, const string& k, const T&
     return ifNotFound;
 }
 
+constexpr fair::mq::Transport FairMQChannel::DefaultTransportType;
+constexpr const char* FairMQChannel::DefaultTransportName;
+constexpr const char* FairMQChannel::DefaultName;
+constexpr const char* FairMQChannel::DefaultType;
+constexpr const char* FairMQChannel::DefaultMethod;
+constexpr const char* FairMQChannel::DefaultAddress;
+constexpr int FairMQChannel::DefaultSndBufSize;
+constexpr int FairMQChannel::DefaultRcvBufSize;
+constexpr int FairMQChannel::DefaultSndKernelSize;
+constexpr int FairMQChannel::DefaultRcvKernelSize;
+constexpr int FairMQChannel::DefaultLinger;
+constexpr int FairMQChannel::DefaultRateLogging;
+constexpr int FairMQChannel::DefaultPortRangeMin;
+constexpr int FairMQChannel::DefaultPortRangeMax;
+constexpr bool FairMQChannel::DefaultAutoBind;
+
 FairMQChannel::FairMQChannel()
     : FairMQChannel(DefaultName, DefaultType, DefaultMethod, DefaultAddress, nullptr)
 {}
diff --git a/fairmq/FairMQDevice.cxx b/fairmq/FairMQDevice.cxx
index 8bab18d0..d955f58c 100644
--- a/fairmq/FairMQDevice.cxx
+++ b/fairmq/FairMQDevice.cxx
@@ -56,6 +56,16 @@ static map<int, Transition> backwardsCompatibilityChangeStateHelper =
     { FairMQDevice::Event::ERROR_FOUND,           Transition::ErrorFound }
 };
 
+constexpr const char* FairMQDevice::DefaultId;
+constexpr int FairMQDevice::DefaultIOThreads;
+constexpr const char* FairMQDevice::DefaultTransportName;
+constexpr fair::mq::Transport FairMQDevice::DefaultTransportType;
+constexpr const char* FairMQDevice::DefaultNetworkInterface;
+constexpr int FairMQDevice::DefaultInitTimeout;
+constexpr uint64_t FairMQDevice::DefaultMaxRunTime;
+constexpr float FairMQDevice::DefaultRate;
+constexpr const char* FairMQDevice::DefaultSession;
+
 FairMQDevice::FairMQDevice()
     : FairMQDevice(nullptr, {0, 0, 0})
 {}