diff --git a/Plugins/FFMPEG/FFMPEGDecoder.m b/Plugins/FFMPEG/FFMPEGDecoder.m
index d5422e7dd..8b5682e7d 100644
--- a/Plugins/FFMPEG/FFMPEGDecoder.m
+++ b/Plugins/FFMPEG/FFMPEGDecoder.m
@@ -290,12 +290,13 @@ int lockmgr_callback(void ** mutex, enum AVLockOp op)
 
 - (long)seek:(long)frame
 {
-    if (frame > totalFrames) { return -1; }
+    if (frame >= totalFrames) { return -1; }
     int64_t ts = frame * (formatCtx->duration) / totalFrames;
     avformat_seek_file(formatCtx, -1, ts - 1000, ts, ts, AVSEEK_FLAG_ANY);
     avcodec_flush_buffers(codecCtx);
     readNextPacket = YES; // so we immediately read next packet
     bytesConsumedFromDecodedFrame = INT_MAX; // so we immediately begin decoding next frame
+    framesRead = frame;
 	
     return frame;
 }