diff --git a/drivers/video/max7456.c b/drivers/video/max7456.c
index 518d5583510..66ba212700f 100644
--- a/drivers/video/max7456.c
+++ b/drivers/video/max7456.c
@@ -1554,11 +1554,11 @@ static int add_interface(FAR const char *path,
     {
       /* Convert @path to a directory name. */
 
-      strcat(buf, "/");
+      strlcat(buf, "/", sizeof(buf));
 
       /* Append the real interface name. */
 
-      strcat(buf, name);
+      strlcat(buf, name, sizeof(buf));
     }
 
   /* Register the interface in the usual way. NuttX will build the
diff --git a/fs/hostfs/hostfs.c b/fs/hostfs/hostfs.c
index 8ee8aed21f8..f250f3d9892 100644
--- a/fs/hostfs/hostfs.c
+++ b/fs/hostfs/hostfs.c
@@ -1002,7 +1002,7 @@ static int hostfs_rewinddir(FAR struct inode *mountpt,
 static int hostfs_bind(FAR struct inode *blkdriver, FAR const void *data,
                        FAR void **handle)
 {
-  FAR struct hostfs_mountpt_s  *fs;
+  FAR struct hostfs_mountpt_s *fs;
   FAR char *options;
   char *saveptr;
   char *ptr;
@@ -1080,7 +1080,7 @@ static int hostfs_bind(FAR struct inode *blkdriver, FAR const void *data,
 
   if (fs->fs_root[len - 1] != '/')
     {
-      strcat(fs->fs_root, "/");
+      strlcat(fs->fs_root, "/", sizeof(fs->fs_root));
     }
 
   *handle = (FAR void *)fs;
diff --git a/fs/rpmsgfs/rpmsgfs.c b/fs/rpmsgfs/rpmsgfs.c
index 71f1349f1ce..c8b8d048b28 100644
--- a/fs/rpmsgfs/rpmsgfs.c
+++ b/fs/rpmsgfs/rpmsgfs.c
@@ -1140,7 +1140,7 @@ static int rpmsgfs_bind(FAR struct inode *blkdriver, FAR const void *data,
 
   if (fs->fs_root[len - 1] != '/')
     {
-      strcat(fs->fs_root, "/");
+      strlcat(fs->fs_root, "/", sizeof(fs->fs_root));
     }
 
   *handle = (FAR void *)fs;