diff --git a/acn/appliance.cpp b/acn/appliance.cpp
index 70d2699..a17bf63 100644
--- a/acn/appliance.cpp
+++ b/acn/appliance.cpp
@@ -67,7 +67,7 @@ void Appliance::UdpStreamHandler(PDU::Stream stream) {
   if (stream->fail())
     return;
 
-  for(auto root : *block) {
+  for(auto const &root : *block) {
     RlpReceiver(root);
   }
 }
@@ -91,7 +91,7 @@ void Appliance::TcpStreamHandler(PDU::Stream stream) {
   if (stream->fail())
     return;
 
-  for(auto root : *block) {
+  for(auto const &root : *block) {
     RlpReceiver(root);
   }
 }
@@ -103,7 +103,7 @@ void Appliance::TcpStreamHandler(PDU::Stream stream) {
 void Appliance::RlpReceiver(std::shared_ptr<RLP::Pdu> root) {
   if (!rlp_vectors_.count(root->vector()))
     return;
-  for(auto handler : rlp_vectors_[root->vector()]) {
+  for(auto const &handler : rlp_vectors_[root->vector()]) {
     handler(root);
   }
 }
diff --git a/acn/dmp.cpp b/acn/dmp.cpp
index acbf946..5bdd238 100644
--- a/acn/dmp.cpp
+++ b/acn/dmp.cpp
@@ -35,7 +35,10 @@ address_type::address_type(uint8_t val) {
   width      = (address_length)(val & 0b11);
 }
 
-range::range(PDU::Stream stream, data_type t, address_length l) {
+range::range(PDU::Stream stream, data_type t, address_length l) :
+    incriment(0),
+    count(0)
+{
   address   = read(stream, l);
   if (t == SINGLE) return;
   incriment = read(stream, l);
diff --git a/sacn/receiver.cpp b/sacn/receiver.cpp
index e613bac..52b6ac1 100644
--- a/sacn/receiver.cpp
+++ b/sacn/receiver.cpp
@@ -66,7 +66,7 @@ void Receiver::rootDataHandler(std::shared_ptr<RLP::Pdu> root) {
   auto block = PDU::readBlock<DATA::Pdu>(root->buffer(), root);
   if (root->buffer()->fail())
     return;
-  for(auto frame : *block) {
+  for(auto const &frame : *block) {
     // 6.2.1 E1.31 Data Packet: Vector
     // Sources sending an E1.31 Data Packet shall set the E1.31 Layer's Vector
     // to VECTOR_E131_DATA_PACKET. This value indicates that the E1.31 framing
@@ -160,7 +160,7 @@ void Receiver::dataPacketHandler(std::shared_ptr<DATA::Pdu> frame) {
   auto block = PDU::readBlock<DMP::Pdu>(frame->buffer(), frame);
   if (frame->buffer()->fail())
     return;
-  for (auto dmp : *block) {
+  for (auto const &dmp : *block) {
     // 7.2 DMP Layer: Vector
     // The DMP Layer's Vector shall be set to VECTOR_DMP_SET_PROPERTY, which
     // indicates a DMP Set Property message by sources. Receivers shall discard