diff --git a/hachoir/parser/container/mp4.py b/hachoir/parser/container/mp4.py
index cf2dd890..3360eb66 100644
--- a/hachoir/parser/container/mp4.py
+++ b/hachoir/parser/container/mp4.py
@@ -1312,7 +1312,7 @@ def validate(self):
         if size < 8:
             return "Invalid first atom size"
         tag = self.stream.readBytes(4 * 8, 4)
-        if tag not in (b"ftyp", b"moov", b"free"):
+        if tag not in (b"ftyp", b"moov", b"free", b"skip"):
             return "Unknown MOV file type"
         return True