diff --git a/libavformat/img2dec.c b/libavformat/img2dec.c
index fbc8a4517a..5a63d7c81d 100644
--- a/libavformat/img2dec.c
+++ b/libavformat/img2dec.c
@@ -1228,7 +1228,7 @@ IMAGEAUTO_DEMUXER(dpx,       DPX)
 IMAGEAUTO_DEMUXER(exr,       EXR)
 IMAGEAUTO_DEMUXER(gem,       GEM)
 IMAGEAUTO_DEMUXER(gif,       GIF)
-IMAGEAUTO_DEMUXER(hdr,       RADIANCE_HDR)
+IMAGEAUTO_DEMUXER_EXT(hdr,   RADIANCE_HDR, HDR)
 IMAGEAUTO_DEMUXER_EXT(j2k,   JPEG2000, J2K)
 IMAGEAUTO_DEMUXER_EXT(jpeg,  MJPEG, JPEG)
 IMAGEAUTO_DEMUXER(jpegls,    JPEGLS)