diff --git a/src/Limelight.h b/src/Limelight.h
index 6c7a62f..e0d17a2 100644
--- a/src/Limelight.h
+++ b/src/Limelight.h
@@ -60,6 +60,9 @@ typedef struct _LENTRY {
 
 // A decode unit describes a buffer chain of video data from multiple packets
 typedef struct _DECODE_UNIT {
+    // Frame number
+    int frameNumber;
+
     // Length of the entire buffer chain in bytes
     int fullLength;
 
diff --git a/src/VideoDepacketizer.c b/src/VideoDepacketizer.c
index 2846529..f809bff 100644
--- a/src/VideoDepacketizer.c
+++ b/src/VideoDepacketizer.c
@@ -230,6 +230,7 @@ static void reassembleFrame(int frameNumber) {
         if (qdu != NULL) {
             qdu->decodeUnit.bufferList = nalChainHead;
             qdu->decodeUnit.fullLength = nalChainDataLength;
+            qdu->decodeUnit.frameNumber = frameNumber;
 
             nalChainHead = NULL;
             nalChainDataLength = 0;