diff --git a/examples/usb_passthrough.rs b/examples/usb_passthrough.rs
index 0c8dc1cc..e1a4982d 100644
--- a/examples/usb_passthrough.rs
+++ b/examples/usb_passthrough.rs
@@ -73,9 +73,11 @@ fn main() -> ! {
     let mut serial1 = usbd_serial::SerialPort::new(&usb1_bus);
     let mut usb1_dev =
         UsbDeviceBuilder::new(&usb1_bus, UsbVidPid(0x16c0, 0x27dd))
-            .manufacturer("Fake company")
-            .product("Serial port")
-            .serial_number("TEST PORT 1")
+            .strings(&[usb_device::device::StringDescriptors::default()
+                .manufacturer("Fake company")
+                .product("Serial port")
+                .serial_number("TEST PORT 1")
+            ]).unwrap()
             .device_class(usbd_serial::USB_CLASS_CDC)
             .build();
 
diff --git a/examples/usb_phy_serial_interrupt.rs b/examples/usb_phy_serial_interrupt.rs
index dff0fee7..bd314a82 100644
--- a/examples/usb_phy_serial_interrupt.rs
+++ b/examples/usb_phy_serial_interrupt.rs
@@ -152,11 +152,13 @@ unsafe fn main() -> ! {
         USB_BUS_ALLOCATOR.as_ref().unwrap(),
         UsbVidPid(VID, PID),
     )
-    .manufacturer("Fake company")
-    .product("Serial port")
-    .serial_number("TEST")
+            .strings(&[usb_device::device::StringDescriptors::default()
+                .manufacturer("Fake company")
+                .product("Serial port")
+                .serial_number("TEST PORT 1")
+            ]).unwrap()
     .device_class(usbd_serial::USB_CLASS_CDC)
-    .max_packet_size_0(64)
+    .max_packet_size_0(64).unwrap()
     .build();
 
     interrupt_free(|cs| {
diff --git a/examples/usb_rtic.rs b/examples/usb_rtic.rs
index 19fe6273..8263b805 100644
--- a/examples/usb_rtic.rs
+++ b/examples/usb_rtic.rs
@@ -91,9 +91,11 @@ mod app {
         .unwrap();
         let serial = usbd_serial::SerialPort::new(usb_bus);
         let usb_dev = UsbDeviceBuilder::new(usb_bus, UsbVidPid(0x16c0, 0x27dd))
-            .manufacturer("Fake company")
-            .product("Serial port")
-            .serial_number("TEST")
+            .strings(&[usb_device::device::StringDescriptors::default()
+                .manufacturer("Fake company")
+                .product("Serial port")
+                .serial_number("TEST PORT 1")
+            ]).unwrap()
             .device_class(usbd_serial::USB_CLASS_CDC)
             .build();
         let usb = (usb_dev, serial);
diff --git a/examples/usb_serial.rs b/examples/usb_serial.rs
index 892e15f6..2ddf85c6 100644
--- a/examples/usb_serial.rs
+++ b/examples/usb_serial.rs
@@ -78,9 +78,11 @@ fn main() -> ! {
 
     let mut usb_dev =
         UsbDeviceBuilder::new(&usb_bus, UsbVidPid(0x16c0, 0x27dd))
-            .manufacturer("Fake company")
-            .product("Serial port")
-            .serial_number("TEST")
+            .strings(&[usb_device::device::StringDescriptors::default()
+                .manufacturer("Fake company")
+                .product("Serial port")
+                .serial_number("TEST PORT 1")
+            ]).unwrap()
             .device_class(usbd_serial::USB_CLASS_CDC)
             .build();
 
diff --git a/src/usb_hs.rs b/src/usb_hs.rs
index 26354e2f..e0aa7983 100644
--- a/src/usb_hs.rs
+++ b/src/usb_hs.rs
@@ -18,7 +18,7 @@
 use crate::rcc;
 use crate::stm32;
 
-use crate::gpio::{self, Alternate, Analog, Speed};
+use crate::gpio::{self, Alternate, Speed};
 
 use crate::time::Hertz;
 
@@ -50,8 +50,8 @@ impl USB1 {
         usb_global: stm32::OTG1_HS_GLOBAL,
         usb_device: stm32::OTG1_HS_DEVICE,
         usb_pwrclk: stm32::OTG1_HS_PWRCLK,
-        _pin_dm: gpio::PA11<Analog>,
-        _pin_dp: gpio::PA12<Analog>,
+        _pin_dm: gpio::PA11<crate::gpio::Analog>,
+        _pin_dp: gpio::PA12<crate::gpio::Analog>,
         prec: rcc::rec::Usb1Otg,
         clocks: &rcc::CoreClocks,
     ) -> Self {