diff --git a/servers/slapd/back-bdb/alock.c b/servers/slapd/back-bdb/alock.c
index 1410413e9e..92fc243edc 100644
--- a/servers/slapd/back-bdb/alock.c
+++ b/servers/slapd/back-bdb/alock.c
@@ -234,7 +234,7 @@ alock_read_slot ( alock_info_t * info,
 
 	if (slot_data->al_appname) free (slot_data->al_appname);
 	slot_data->al_appname = calloc (1, ALOCK_MAX_APPNAME);
-	strncpy (slot_data->al_appname, slotbuf+32, ALOCK_MAX_APPNAME-1);
+	strncpy (slot_data->al_appname, (char *)slotbuf+32, ALOCK_MAX_APPNAME-1);
 	(slot_data->al_appname) [ALOCK_MAX_APPNAME-1] = '\0';
 
 	return 0;
@@ -259,7 +259,7 @@ alock_write_slot ( alock_info_t * info,
 	alock_write_iattr (slotbuf+16, slot_data->al_stamp);
 	alock_write_iattr (slotbuf+24, slot_data->al_pid);
 
-	strncpy (slotbuf+32, slot_data->al_appname, ALOCK_MAX_APPNAME-1);
+	strncpy ((char *)slotbuf+32, slot_data->al_appname, ALOCK_MAX_APPNAME-1);
 	slotbuf[ALOCK_SLOT_SIZE-1] = '\0';
 
 	res = lseek (info->al_fd,