diff --git a/media/libstagefright/MPEG4Extractor.cpp b/media/libstagefright/MPEG4Extractor.cpp
index 0ec871604e2dd..4ec28f110bd1e 100644
--- a/media/libstagefright/MPEG4Extractor.cpp
+++ b/media/libstagefright/MPEG4Extractor.cpp
@@ -2262,7 +2262,8 @@ static bool LegacySniffMPEG4(
         || !memcmp(header, "ftypisom", 8) || !memcmp(header, "ftypM4V ", 8)
         || !memcmp(header, "ftypM4A ", 8) || !memcmp(header, "ftypf4v ", 8)
         || !memcmp(header, "ftypkddi", 8) || !memcmp(header, "ftypM4VP", 8)
-        || !memcmp(header, "ftypMSNV", 8) || !memcmp(header, "ftypavc1", 8)) {
+        || !memcmp(header, "ftypMSNV", 8) || !memcmp(header, "ftypavc1", 8)
+        || !memcmp(header, "ftypmmp4", 8)) {
         *mimeType = MEDIA_MIMETYPE_CONTAINER_MPEG4;
         *confidence = 0.4;