diff --git a/libdaemon/server/daemon-server.c b/libdaemon/server/daemon-server.c
index 97839d85a..65c8859cb 100644
--- a/libdaemon/server/daemon-server.c
+++ b/libdaemon/server/daemon-server.c
@@ -323,7 +323,7 @@ static void _remove_lockfile(const char *file)
 		perror("unlink failed");
 }
 
-static void _daemonise(daemon_state s)
+static void _daemonize(daemon_state s)
 {
 	int child_status;
 	int fd;
@@ -582,7 +582,7 @@ void daemon_start(daemon_state s)
 #endif
 
 	if (!s.foreground)
-		_daemonise(s);
+		_daemonize(s);
 
 	s.log = &_log;
 	s.log->name = s.name;
diff --git a/libdm/dm-tools/dmfilemapd.c b/libdm/dm-tools/dmfilemapd.c
index 6ee673213..92efda954 100644
--- a/libdm/dm-tools/dmfilemapd.c
+++ b/libdm/dm-tools/dmfilemapd.c
@@ -624,7 +624,7 @@ check_unlinked:
 	return 1;
 }
 
-static int _daemonise(struct filemap_monitor *fm)
+static int _daemonize(struct filemap_monitor *fm)
 {
 	pid_t pid = 0;
 	int fd, ffd;
@@ -825,7 +825,7 @@ int main(int argc, char **argv)
 		 "mode=%s, path=\"%s\"", fm.fd, fm.group_id,
 		 _mode_names[fm.mode], fm.path);
 
-	if (!_foreground && !_daemonise(&fm)) {
+	if (!_foreground && !_daemonize(&fm)) {
 		free(fm.path);
 		return 1;
 	}