diff --git a/libraries/USBHost/library.properties b/libraries/USBHost/library.properties
index cfd5eb9bdadd08c1273ffe465ff5687b8d17a3cb..72798950e162f5942a95f42e4dd29b284d4530cb 100644
--- a/libraries/USBHost/library.properties
+++ b/libraries/USBHost/library.properties
@@ -5,4 +5,4 @@ maintainer=Arduino <info@arduino.cc>
 sentence=Allows the communication with USB peripherals like mice, keyboards, and thumbdrives. For Arduino DUE only.
 paragraph=The USBHost library allows an Arduino Due board to appear as a USB host, enabling it to communicate with peripherals like USB mice and keyboards. USBHost does not support devices that are connected through USB hubs. This includes some keyboards that have an internal hub.
 url=http://arduino.cc/en/Reference/USBHost
-architectures=sam
+architectures=samd
diff --git a/libraries/USBHost/src/Usb.cpp b/libraries/USBHost/src/Usb.cpp
index ea2b8c46ceab3e62a5a80425c3cca0a40335eca6..6c1570b82f46f3178ff60ff917f785664de5315b 100644
--- a/libraries/USBHost/src/Usb.cpp
+++ b/libraries/USBHost/src/Usb.cpp
@@ -21,7 +21,7 @@ e-mail   :  support@circuitsathome.com
 #include "Usb.h"
 
 
-#ifdef ARDUINO_SAM_ZERO
+#ifdef ARDUINO_SAMD_ZERO
 
 static uint32_t usb_error = 0;
 static uint32_t usb_task_state = USB_DETACHED_SUBSTATE_INITIALIZE;
@@ -854,4 +854,4 @@ uint32_t USBHost::setConf(uint32_t addr, uint32_t ep, uint32_t conf_value) {
         return ( ctrlReq(addr, ep, bmREQ_SET, USB_REQUEST_SET_CONFIGURATION, conf_value, 0x00, 0x0000, 0x0000, 0x0000, NULL, NULL));
 }
 
-#endif //ARDUINO_SAM_ZERO
+#endif //ARDUINO_SAMD_ZERO