diff --git a/media/mtp/MtpPacket.cpp b/media/mtp/MtpPacket.cpp
index f196d87..af67fc0 100644
--- a/media/mtp/MtpPacket.cpp
+++ b/media/mtp/MtpPacket.cpp
@@ -168,8 +168,10 @@
         return;
     }
     int offset = MTP_CONTAINER_PARAMETER_OFFSET + (index - 1) * sizeof(uint32_t);
-    if (mPacketSize < offset + sizeof(uint32_t))
+    if (mPacketSize < offset + sizeof(uint32_t)) {
         mPacketSize = offset + sizeof(uint32_t);
+        allocate(mPacketSize);
+    }
     putUInt32(offset, value);
 }