diff --git a/drivers/include/drivers/interfaces/InterfaceDigitalIn.h b/drivers/include/drivers/interfaces/InterfaceDigitalIn.h
index 78374ea1f905..a8eda9e72fef 100644
--- a/drivers/include/drivers/interfaces/InterfaceDigitalIn.h
+++ b/drivers/include/drivers/interfaces/InterfaceDigitalIn.h
@@ -38,7 +38,7 @@ struct DigitalIn {
     virtual void mode(PinMode pull) = 0;
     virtual int is_connected() = 0;
 
-    virtual operator int()
+    operator int()
     {
         // Underlying implementation is responsible for thread-safety
         return read();
diff --git a/drivers/include/drivers/interfaces/InterfaceDigitalInOut.h b/drivers/include/drivers/interfaces/InterfaceDigitalInOut.h
index 655c4bafcbe9..45003cd28885 100644
--- a/drivers/include/drivers/interfaces/InterfaceDigitalInOut.h
+++ b/drivers/include/drivers/interfaces/InterfaceDigitalInOut.h
@@ -42,21 +42,21 @@ struct DigitalInOut {
     virtual void mode(PinMode pull) = 0;
     virtual int is_connected() = 0;
 
-    virtual DigitalInOut &operator= (int value)
+    DigitalInOut &operator= (int value)
     {
         // Underlying implementation is responsible for thread-safety
         write(value);
         return *this;
     }
 
-    virtual DigitalInOut &operator= (DigitalInOut &rhs)
+    DigitalInOut &operator= (DigitalInOut &rhs)
     {
         // Underlying implementation is responsible for thread-safety
         write(rhs.read());
         return *this;
     }
 
-    virtual operator int()
+    operator int()
     {
         // Underlying implementation is responsible for thread-safety
         return read();
diff --git a/drivers/include/drivers/interfaces/InterfaceDigitalOut.h b/drivers/include/drivers/interfaces/InterfaceDigitalOut.h
index deb0d14c23f1..321e33e5afc6 100644
--- a/drivers/include/drivers/interfaces/InterfaceDigitalOut.h
+++ b/drivers/include/drivers/interfaces/InterfaceDigitalOut.h
@@ -39,21 +39,21 @@ struct DigitalOut {
     virtual int read() = 0;
     virtual int is_connected() = 0;
 
-    virtual DigitalOut &operator= (int value)
+    DigitalOut &operator= (int value)
     {
         // Underlying implementation is responsible for thread-safety
         write(value);
         return *this;
     }
 
-    virtual DigitalOut &operator= (DigitalOut &rhs)
+    DigitalOut &operator= (DigitalOut &rhs)
     {
         // Underlying implementation is responsible for thread-safety
         write(rhs.read());
         return *this;
     }
 
-    virtual operator int()
+    operator int()
     {
         // Underlying implementation is responsible for thread-safety
         return read();