diff --git a/fftools/ffmpeg_demux.c b/fftools/ffmpeg_demux.c
index e845e6784d..be0e8970ba 100644
--- a/fftools/ffmpeg_demux.c
+++ b/fftools/ffmpeg_demux.c
@@ -886,6 +886,7 @@ int ifile_open(const OptionsContext *o, const char *filename)
         filename = "pipe:";
 
     stdin_interaction &= strncmp(filename, "pipe:", 5) &&
+                         strcmp(filename, "fd:") &&
                          strcmp(filename, "/dev/stdin");
 
     /* get default parameters from command line */