diff --git a/libraries/mbed/api/BusIn.h b/libraries/mbed/api/BusIn.h
index c5ece1df68..92c9eeb5a6 100644
--- a/libraries/mbed/api/BusIn.h
+++ b/libraries/mbed/api/BusIn.h
@@ -58,10 +58,16 @@ public:
      */
     void mode(PinMode pull);
 
+    static DigitalIn din_dummy;
+
 #ifdef MBED_OPERATORS
     /** A shorthand for read()
      */
     operator int();
+
+    /** Access to particular bit in random-iterator fashion
+     */
+    DigitalIn & operator[] (unsigned int index);
 #endif
 
 protected:
diff --git a/libraries/mbed/api/BusOut.h b/libraries/mbed/api/BusOut.h
index 9a6608e89e..4212c76637 100644
--- a/libraries/mbed/api/BusOut.h
+++ b/libraries/mbed/api/BusOut.h
@@ -56,12 +56,18 @@ public:
      */
     int read();
 
+    static DigitalOut dout_dummy;
+
 #ifdef MBED_OPERATORS
     /** A shorthand for write()
      */
     BusOut& operator= (int v);
     BusOut& operator= (BusOut& rhs);
 
+    /** Access to particular bit in random-iterator fashion
+     */
+    DigitalOut& operator[] (unsigned int index);
+
     /** A shorthand for read()
      */
     operator int();
diff --git a/libraries/mbed/common/BusIn.cpp b/libraries/mbed/common/BusIn.cpp
index c1eb3dbdb1..895003c409 100644
--- a/libraries/mbed/common/BusIn.cpp
+++ b/libraries/mbed/common/BusIn.cpp
@@ -17,6 +17,8 @@
 
 namespace mbed {
 
+DigitalIn BusIn::din_dummy(NC);
+
 BusIn::BusIn(PinName p0, PinName p1, PinName p2, PinName p3, PinName p4, PinName p5, PinName p6, PinName p7, PinName p8, PinName p9, PinName p10, PinName p11, PinName p12, PinName p13, PinName p14, PinName p15) {
     PinName pins[16] = {p0, p1, p2, p3, p4, p5, p6, p7, p8, p9, p10, p11, p12, p13, p14, p15};
 
@@ -61,6 +63,16 @@ void BusIn::mode(PinMode pull) {
 BusIn::operator int() {
     return read();
 }
+
+DigitalIn& BusIn::operator[] (unsigned int index) {
+    //MBED_ASSERT(index >= MBED_BUS_SIZE);
+    //MBED_ASSERT(_pin[index]);
+    if (index >= 16 || _pin[index] == NULL) {
+        return din_dummy;
+    }
+    return *_pin[index];
+}
+
 #endif
 
 } // namespace mbed
diff --git a/libraries/mbed/common/BusOut.cpp b/libraries/mbed/common/BusOut.cpp
index 7e9a5f7dbe..6cf4f3c605 100644
--- a/libraries/mbed/common/BusOut.cpp
+++ b/libraries/mbed/common/BusOut.cpp
@@ -17,6 +17,8 @@
 
 namespace mbed {
 
+DigitalOut BusOut::dout_dummy(NC);
+
 BusOut::BusOut(PinName p0, PinName p1, PinName p2, PinName p3, PinName p4, PinName p5, PinName p6, PinName p7, PinName p8, PinName p9, PinName p10, PinName p11, PinName p12, PinName p13, PinName p14, PinName p15) {
     PinName pins[16] = {p0, p1, p2, p3, p4, p5, p6, p7, p8, p9, p10, p11, p12, p13, p14, p15};
 
@@ -68,6 +70,15 @@ BusOut& BusOut::operator= (BusOut& rhs) {
     return *this;
 }
 
+DigitalOut& BusOut::operator[] (unsigned int index) {
+    //MBED_ASSERT(index >= MBED_BUS_SIZE);
+    //MBED_ASSERT(_pin[index]);
+    if (index >= 16 || _pin[index] == NULL) {
+        return dout_dummy;
+    }
+    return *_pin[index];
+}
+
 BusOut::operator int() {
     return read();
 }