diff --git a/sbin/fsck/fsutil.c b/sbin/fsck/fsutil.c
index 935992e9bda..348b288ed21 100644
--- a/sbin/fsck/fsutil.c
+++ b/sbin/fsck/fsutil.c
@@ -172,6 +172,9 @@ getmntpt(const char *name)
 		statfsp = &mntbuf[i];
 		dev_name = statfsp->f_mntfromname;
 		if (*dev_name != '/') {
+			if (strlen(_PATH_DEV) + strlen(dev_name) + 1 >
+			    sizeof(statfsp->f_mntfromname))
+				continue;
 			strcpy(device, _PATH_DEV);
 			strcat(device, dev_name);
 			strcpy(statfsp->f_mntfromname, device);