diff --git a/fairmq/plugins/control/Control.cxx b/fairmq/plugins/control/Control.cxx
index 9dedf3fa..d0c9f9bb 100644
--- a/fairmq/plugins/control/Control.cxx
+++ b/fairmq/plugins/control/Control.cxx
@@ -147,7 +147,7 @@ auto Control::InteractiveMode() -> void
 try {
     RunStartupSequence();
 
-    char input; // hold the user console input
+    char input = 0; // hold the user console input
     pollfd cinfd[1];
     cinfd[0].fd = fileno(stdin);
     cinfd[0].events = POLLIN;
diff --git a/fairmq/sdk/commands/Commands.cxx b/fairmq/sdk/commands/Commands.cxx
index 6dab0e82..b250264e 100644
--- a/fairmq/sdk/commands/Commands.cxx
+++ b/fairmq/sdk/commands/Commands.cxx
@@ -390,7 +390,7 @@ void Cmds::Deserialize(const string& str, const Format type)
 {
     fCmds.clear();
 
-    const flatbuffers::Vector<flatbuffers::Offset<FBCommand>>* cmds;
+    const flatbuffers::Vector<flatbuffers::Offset<FBCommand>>* cmds = nullptr;
 
     if (type == Format::Binary) {
         cmds = cmd::GetFBCommands(const_cast<char*>(str.c_str()))->commands();
diff --git a/fairmq/sdk/runDDSCommandUI.cxx b/fairmq/sdk/runDDSCommandUI.cxx
index 085c6384..f0d3dffb 100644
--- a/fairmq/sdk/runDDSCommandUI.cxx
+++ b/fairmq/sdk/runDDSCommandUI.cxx
@@ -156,7 +156,7 @@ void sendCommand(const string& commandIn, const string& path, unsigned int timeo
         return;
     }
 
-    char c;
+    char c = 0;
     string command;
     TerminalConfig tconfig;
 
@@ -185,7 +185,7 @@ try {
     string targetState;
     string pKey;
     string pVal;
-    unsigned int timeout;
+    unsigned int timeout = 0;
 
     fair::Logger::SetConsoleSeverity("debug");
     fair::Logger::SetConsoleColor(true);
diff --git a/fairmq/shmem/Monitor.cxx b/fairmq/shmem/Monitor.cxx
index 624ad26f..bcae2d81 100644
--- a/fairmq/shmem/Monitor.cxx
+++ b/fairmq/shmem/Monitor.cxx
@@ -313,8 +313,8 @@ void Monitor::ReceiveHeartbeats()
     try {
         bipc::message_queue mq(bipc::open_or_create, fControlQueueName.c_str(), 1000, 256);
 
-        unsigned int priority;
-        bipc::message_queue::size_type recvdSize;
+        unsigned int priority = 0;
+        bipc::message_queue::size_type recvdSize = 0;
         char msg[256] = {0};
 
         while (!fTerminating) {
@@ -337,7 +337,7 @@ void Monitor::ReceiveHeartbeats()
 
 void Monitor::Interactive()
 {
-    char c;
+    char c = 0;
     pollfd cinfd[1];
     cinfd[0].fd = fileno(stdin);
     cinfd[0].events = POLLIN;
diff --git a/fairmq/shmem/Region.h b/fairmq/shmem/Region.h
index 419453c2..6cf3a862 100644
--- a/fairmq/shmem/Region.h
+++ b/fairmq/shmem/Region.h
@@ -179,8 +179,8 @@ struct Region
     }
     void ReceiveAcks()
     {
-        unsigned int priority;
-        boost::interprocess::message_queue::size_type recvdSize;
+        unsigned int priority = 0;
+        boost::interprocess::message_queue::size_type recvdSize = 0;
         std::unique_ptr<RegionBlock[]> blocks = std::make_unique<RegionBlock[]>(fAckBunchSize);
         std::vector<fair::mq::RegionBlock> result;
         result.reserve(fAckBunchSize);
diff --git a/fairmq/shmem/TransportFactory.h b/fairmq/shmem/TransportFactory.h
index 15797f2c..1d34e296 100644
--- a/fairmq/shmem/TransportFactory.h
+++ b/fairmq/shmem/TransportFactory.h
@@ -41,7 +41,7 @@ class TransportFactory final : public fair::mq::TransportFactory
         , fZmqCtx(zmq_ctx_new())
         , fManager(nullptr)
     {
-        int major, minor, patch;
+        int major = 0, minor = 0, patch = 0;
         zmq_version(&major, &minor, &patch);
         LOG(debug) << "Transport: Using ZeroMQ (" << major << "." << minor << "." << patch << ") & "
                 << "boost::interprocess (" << (BOOST_VERSION / 100000) << "." << (BOOST_VERSION / 100 % 1000) << "." << (BOOST_VERSION % 100) << ")";
diff --git a/fairmq/tools/Network.cxx b/fairmq/tools/Network.cxx
index c44cf0c9..327b2437 100644
--- a/fairmq/tools/Network.cxx
+++ b/fairmq/tools/Network.cxx
@@ -40,9 +40,9 @@ namespace fair::mq::tools
 map<string, string> getHostIPs()
 {
     map<string, string> addressMap;
-    ifaddrs* ifaddr;
-    ifaddrs* ifa;
-    int s;
+    ifaddrs* ifaddr = nullptr;
+    ifaddrs* ifa = nullptr;
+    int s = 0;
     array<char, NI_MAXHOST> host{};
 
     if (getifaddrs(&ifaddr) == -1) {
diff --git a/fairmq/zeromq/TransportFactory.h b/fairmq/zeromq/TransportFactory.h
index c54e400b..ec1806dc 100644
--- a/fairmq/zeromq/TransportFactory.h
+++ b/fairmq/zeromq/TransportFactory.h
@@ -31,7 +31,7 @@ class TransportFactory final : public FairMQTransportFactory
         : FairMQTransportFactory(id)
         , fCtx(nullptr)
     {
-        int major, minor, patch;
+        int major = 0, minor = 0, patch = 0;
         zmq_version(&major, &minor, &patch);
         LOG(debug) << "Transport: Using ZeroMQ library, version: " << major << "." << minor << "." << patch;