diff --git a/media/libstagefright/timedtext/TextDescriptions.cpp b/media/libstagefright/timedtext/TextDescriptions.cpp
index c762a74..83d15a2 100644
--- a/media/libstagefright/timedtext/TextDescriptions.cpp
+++ b/media/libstagefright/timedtext/TextDescriptions.cpp
@@ -383,7 +383,7 @@
         tmpData += 8;
         size_t remaining = size - 8;
 
-        if (size < chunkSize) {
+        if (chunkSize <= 8 || size < chunkSize) {
             return OK;
         }
         switch(chunkType) {