diff --git a/common/usb_memcpy.h b/common/usb_memcpy.h
index 064de3da..e3cc7a24 100644
--- a/common/usb_memcpy.h
+++ b/common/usb_memcpy.h
@@ -3,6 +3,9 @@
  *
  * SPDX-License-Identifier: Apache-2.0
  */
+#ifndef USB_MEMCPY_H
+#define USB_MEMCPY_H
+
 #include <stdint.h>
 #include <stddef.h>
 
@@ -84,4 +87,5 @@ static inline void *usb_memcpy(void *s1, const void *s2, size_t n)
         }
     }
     return s1;
-}
\ No newline at end of file
+}
+#endif