diff --git a/fftools/ffmpeg_opt.c b/fftools/ffmpeg_opt.c
index 45ed727e5e..e55b584fd4 100644
--- a/fftools/ffmpeg_opt.c
+++ b/fftools/ffmpeg_opt.c
@@ -178,7 +178,6 @@ int64_t stats_period = 500000;
 static int file_overwrite     = 0;
 static int no_file_overwrite  = 0;
 static int do_psnr            = 0;
-static int input_sync;
 static int input_stream_potentially_available = 0;
 static int ignore_unknown_streams = 0;
 static int copy_unknown_streams = 0;
@@ -3867,9 +3866,6 @@ const OptionDef options[] = {
     { "canvas_size", OPT_SUBTITLE | HAS_ARG | OPT_STRING | OPT_SPEC | OPT_INPUT, { .off = OFFSET(canvas_sizes) },
         "set canvas size (WxH or abbreviation)", "size" },
 
-    /* grab options */
-    { "isync", OPT_BOOL | OPT_EXPERT, { &input_sync }, "this option is deprecated and does nothing", "" },
-
     /* muxer options */
     { "muxdelay",   OPT_FLOAT | HAS_ARG | OPT_EXPERT | OPT_OFFSET | OPT_OUTPUT, { .off = OFFSET(mux_max_delay) },
         "set the maximum demux-decode delay", "seconds" },