diff --git a/common/usb_log.h b/common/usb_log.h
index ed6e7561..94eedfb6 100644
--- a/common/usb_log.h
+++ b/common/usb_log.h
@@ -86,12 +86,12 @@ void usb_assert(const char *filename, int linenum);
 static inline void usb_hexdump(const void *ptr, uint32_t buflen)
 {
     unsigned char *buf = (unsigned char *)ptr;
-    uint32_t i, j;
+    unsigned int i, j;
 
     (void)buf;
 
     for (i = 0; i < buflen; i += 16) {
-        CONFIG_USB_PRINTF("%08lx:", i);
+        CONFIG_USB_PRINTF("%08x:", i);
 
         for (j = 0; j < 16; j++)
             if (i + j < buflen) {