diff --git a/lib/prototypes.h b/lib/prototypes.h
index 22603b98..90651fb9 100644
--- a/lib/prototypes.h
+++ b/lib/prototypes.h
@@ -161,12 +161,10 @@ extern int find_new_uid (bool sys_user,
 
 #ifdef ENABLE_SUBIDS
 /* find_new_sub_gids.c */
-extern int find_new_sub_gids (const char *owner,
-			      gid_t *range_start, unsigned long *range_count);
+extern int find_new_sub_gids (gid_t *range_start, unsigned long *range_count);
 
 /* find_new_sub_uids.c */
-extern int find_new_sub_uids (const char *owner,
-			      uid_t *range_start, unsigned long *range_count);
+extern int find_new_sub_uids (uid_t *range_start, unsigned long *range_count);
 #endif				/* ENABLE_SUBIDS */
 
 
diff --git a/libmisc/find_new_sub_gids.c b/libmisc/find_new_sub_gids.c
index ae8a937c..4d25abad 100644
--- a/libmisc/find_new_sub_gids.c
+++ b/libmisc/find_new_sub_gids.c
@@ -46,8 +46,7 @@
  * 
  * Return 0 on success, -1 if no unused GIDs are available.
  */
-int find_new_sub_gids (const char *owner,
-		       gid_t *range_start, unsigned long *range_count)
+int find_new_sub_gids (gid_t *range_start, unsigned long *range_count)
 {
 	unsigned long min, max;
 	unsigned long count;
diff --git a/libmisc/find_new_sub_uids.c b/libmisc/find_new_sub_uids.c
index 12cb2d2e..7113887e 100644
--- a/libmisc/find_new_sub_uids.c
+++ b/libmisc/find_new_sub_uids.c
@@ -46,8 +46,7 @@
  * 
  * Return 0 on success, -1 if no unused UIDs are available.
  */
-int find_new_sub_uids (const char *owner,
-		       uid_t *range_start, unsigned long *range_count)
+int find_new_sub_uids (uid_t *range_start, unsigned long *range_count)
 {
 	unsigned long min, max;
 	unsigned long count;
diff --git a/src/newusers.c b/src/newusers.c
index e9fe0e27..3104d6fd 100644
--- a/src/newusers.c
+++ b/src/newusers.c
@@ -1251,7 +1251,7 @@ int main (int argc, char **argv)
 		if (is_sub_uid && !sub_uid_assigned(fields[0])) {
 			uid_t sub_uid_start = 0;
 			unsigned long sub_uid_count = 0;
-			if (find_new_sub_uids(fields[0], &sub_uid_start, &sub_uid_count) == 0) {
+			if (find_new_sub_uids(&sub_uid_start, &sub_uid_count) == 0) {
 				if (sub_uid_add(fields[0], sub_uid_start, sub_uid_count) == 0) {
 					fprintf (stderr,
 						_("%s: failed to prepare new %s entry\n"),
@@ -1271,7 +1271,7 @@ int main (int argc, char **argv)
 		if (is_sub_gid && !sub_gid_assigned(fields[0])) {
 			gid_t sub_gid_start = 0;
 			unsigned long sub_gid_count = 0;
-			if (find_new_sub_gids(fields[0], &sub_gid_start, &sub_gid_count) == 0) {
+			if (find_new_sub_gids(&sub_gid_start, &sub_gid_count) == 0) {
 				if (sub_gid_add(fields[0], sub_gid_start, sub_gid_count) == 0) {
 					fprintf (stderr,
 						_("%s: failed to prepare new %s entry\n"),
diff --git a/src/useradd.c b/src/useradd.c
index 645d4a40..8d8b4cf5 100644
--- a/src/useradd.c
+++ b/src/useradd.c
@@ -2465,7 +2465,7 @@ int main (int argc, char **argv)
 
 #ifdef ENABLE_SUBIDS
 	if (is_sub_uid) {
-		if (find_new_sub_uids(user_name, &sub_uid_start, &sub_uid_count) < 0) {
+		if (find_new_sub_uids(&sub_uid_start, &sub_uid_count) < 0) {
 			fprintf (stderr,
 			         _("%s: can't create subordinate user IDs\n"),
 			         Prog);
@@ -2473,7 +2473,7 @@ int main (int argc, char **argv)
 		}
 	}
 	if (is_sub_gid) {
-		if (find_new_sub_gids(user_name, &sub_gid_start, &sub_gid_count) < 0) {
+		if (find_new_sub_gids(&sub_gid_start, &sub_gid_count) < 0) {
 			fprintf (stderr,
 			         _("%s: can't create subordinate group IDs\n"),
 			         Prog);