diff --git a/sys/dev/nvme/nvme.h b/sys/dev/nvme/nvme.h
--- a/sys/dev/nvme/nvme.h
+++ b/sys/dev/nvme/nvme.h
@@ -29,10 +29,6 @@
 #ifndef __NVME_H__
 #define __NVME_H__
 
-#ifdef _KERNEL
-#include <sys/types.h>
-#endif
-
 #include <sys/param.h>
 #include <sys/endian.h>
 #ifndef _KERNEL
@@ -2010,7 +2006,7 @@
 	_Static_assert(NVME_SERIAL_NUMBER_LENGTH < DISK_IDENT_SIZE,
 		"NVME serial number too big for disk ident");
 
-	memmove(sn, cdata->sn, NVME_SERIAL_NUMBER_LENGTH);
+	memcpy(sn, cdata->sn, NVME_SERIAL_NUMBER_LENGTH);
 	sn[NVME_SERIAL_NUMBER_LENGTH] = '\0';
 	for (int i = 0; sn[i] != '\0'; i++) {
 		if (sn[i] < 0x20 || sn[i] >= 0x80)