diff --git a/hardware/arduino/avr/cores/arduino/Stream.cpp b/hardware/arduino/avr/cores/arduino/Stream.cpp
index 39873aac8..9c581bee1 100644
--- a/hardware/arduino/avr/cores/arduino/Stream.cpp
+++ b/hardware/arduino/avr/cores/arduino/Stream.cpp
@@ -75,7 +75,7 @@ void Stream::setTimeout(unsigned long timeout)  // sets the maximum number of mi
  // find returns true if the target string is found
 bool  Stream::find(char *target)
 {
-  return findUntil(target, "");
+  return findUntil(target, (char*)"");
 }
 
 // reads data from the stream until the target string of given length is found
diff --git a/hardware/arduino/sam/cores/arduino/Stream.cpp b/hardware/arduino/sam/cores/arduino/Stream.cpp
index 39873aac8..9c581bee1 100644
--- a/hardware/arduino/sam/cores/arduino/Stream.cpp
+++ b/hardware/arduino/sam/cores/arduino/Stream.cpp
@@ -75,7 +75,7 @@ void Stream::setTimeout(unsigned long timeout)  // sets the maximum number of mi
  // find returns true if the target string is found
 bool  Stream::find(char *target)
 {
-  return findUntil(target, "");
+  return findUntil(target, (char*)"");
 }
 
 // reads data from the stream until the target string of given length is found
diff --git a/libraries/Ethernet/src/utility/socket.cpp b/libraries/Ethernet/src/utility/socket.cpp
index 5332981d2..b6d76f1a8 100644
--- a/libraries/Ethernet/src/utility/socket.cpp
+++ b/libraries/Ethernet/src/utility/socket.cpp
@@ -319,7 +319,6 @@ void flush(SOCKET s) {
 
 uint16_t igmpsend(SOCKET s, const uint8_t * buf, uint16_t len)
 {
-  uint8_t status=0;
   uint16_t ret=0;
 
   if (len > W5100.SSIZE) 
@@ -335,7 +334,6 @@ uint16_t igmpsend(SOCKET s, const uint8_t * buf, uint16_t len)
 
   while ( (W5100.readSnIR(s) & SnIR::SEND_OK) != SnIR::SEND_OK ) 
   {
-    status = W5100.readSnSR(s);
     if (W5100.readSnIR(s) & SnIR::TIMEOUT)
     {
       /* in case of igmp, if send fails, then socket closed */