diff --git a/libntfs-3g/security.c b/libntfs-3g/security.c
index c13c1808..213d88c0 100644
--- a/libntfs-3g/security.c
+++ b/libntfs-3g/security.c
@@ -1239,8 +1239,7 @@ static BOOL groupmember(struct SECURITY_CONTEXT *scx, uid_t uid, gid_t gid)
 	else {
 		ismember = FALSE; /* default return */
 		tid = scx->tid;
-		sprintf(filename,"/proc/%u/task/%u/status",
-				(unsigned int)tid,(unsigned int)tid);
+		sprintf(filename,"/proc/%u/task/%u/status",tid,tid);
 		fd = open(filename,O_RDONLY);
 		if (fd >= 0) {
 			got = read(fd, buf, BUFSZ);