3 files changed, 5 insertions, 1 deletions
diff --git a/host/include/uhd/transport/usb_control.hpp b/host/include/uhd/transport/usb_control.hpp
index 786bd0815..4576d6e92 100644
--- a/host/include/uhd/transport/usb_control.hpp
+++ b/host/include/uhd/transport/usb_control.hpp
@@ -26,7 +26,7 @@ class UHD_API usb_control : boost::noncopyable {
 public:
     typedef boost::shared_ptr<usb_control> sptr;
 
-    virtual ~usb_control(void) = 0;
+    virtual ~usb_control(void);
 
     /*!
      * Create a new USB control transport:
diff --git a/host/include/uhd/transport/usb_device_handle.hpp b/host/include/uhd/transport/usb_device_handle.hpp
index bf122f549..a8bbfc965 100644
--- a/host/include/uhd/transport/usb_device_handle.hpp
+++ b/host/include/uhd/transport/usb_device_handle.hpp
@@ -43,6 +43,8 @@ public:
     typedef boost::shared_ptr<usb_device_handle> sptr;
     typedef std::pair<boost::uint16_t, boost::uint16_t> vid_pid_pair_t;
 
+    virtual ~usb_device_handle(void);
+
     /*!
      * Return the device's serial number
      * \return a string describing the device's serial number
diff --git a/host/include/uhd/transport/usb_zero_copy.hpp b/host/include/uhd/transport/usb_zero_copy.hpp
index eb28040b6..092873803 100644
--- a/host/include/uhd/transport/usb_zero_copy.hpp
+++ b/host/include/uhd/transport/usb_zero_copy.hpp
@@ -38,6 +38,8 @@ class UHD_API usb_zero_copy : public virtual zero_copy_if {
 public:
     typedef boost::shared_ptr<usb_zero_copy> sptr;
 
+    virtual ~usb_zero_copy(void);
+
     /*!
      * Make a new zero copy USB transport:
      * This transport is for sending and receiving between the host