diff --git a/fftools/ffmpeg.h b/fftools/ffmpeg.h
index db7413adcd..701a211544 100644
--- a/fftools/ffmpeg.h
+++ b/fftools/ffmpeg.h
@@ -712,8 +712,6 @@ int ifilter_parameters_from_frame(InputFilter *ifilter, const AVFrame *frame);
 
 int ffmpeg_parse_options(int argc, char **argv);
 
-int videotoolbox_init(AVCodecContext *s);
-
 HWDevice *hw_device_get_by_name(const char *name);
 int hw_device_init_from_string(const char *arg, HWDevice **dev);
 void hw_device_free_all(void);