diff --git a/lib/libufs/cgroup.c b/lib/libufs/cgroup.c
index 2185682e098..28e5ea87a43 100644
--- a/lib/libufs/cgroup.c
+++ b/lib/libufs/cgroup.c
@@ -59,7 +59,7 @@ cgread1(struct uufsd *disk, int c)
 
 	fs = &disk->d_fs;
 
-	if (c >= fs->fs_ncg) {
+	if ((unsigned)c >= fs->fs_ncg) {
 		return (0);
 	}
 	ccg = fsbtodb(fs, cgtod(fs, c)) * disk->d_bsize;