diff --git a/libraries/Bridge/src/Bridge.cpp b/libraries/Bridge/src/Bridge.cpp
index 677316e31..4cf74661d 100644
--- a/libraries/Bridge/src/Bridge.cpp
+++ b/libraries/Bridge/src/Bridge.cpp
@@ -87,10 +87,11 @@ void BridgeClass::begin() {
 void BridgeClass::put(const char *key, const char *value) {
   // TODO: do it in a more efficient way
   String cmd = "D";
+  uint8_t res[1];
   cmd += key;
   cmd += "\xFE";
   cmd += value;
-  transfer((uint8_t*)cmd.c_str(), cmd.length());
+  transfer((uint8_t*)cmd.c_str(), cmd.length(), res, 1);
 }
 
 unsigned int BridgeClass::get(const char *key, uint8_t *value, unsigned int maxlen) {
diff --git a/libraries/Bridge/src/FileIO.cpp b/libraries/Bridge/src/FileIO.cpp
index 5f4a2e116..603657239 100644
--- a/libraries/Bridge/src/FileIO.cpp
+++ b/libraries/Bridge/src/FileIO.cpp
@@ -175,7 +175,8 @@ void File::close() {
   if (mode == 255)
     return;
   uint8_t cmd[] = {'f', handle};
-  bridge.transfer(cmd, 2);
+  uint8_t ret[1];
+  bridge.transfer(cmd, 2, ret, 1);
   mode = 255;
 }