diff --git a/libavcodec/tiff.h b/libavcodec/tiff.h
index 1c515927a5..dfabe291db 100644
--- a/libavcodec/tiff.h
+++ b/libavcodec/tiff.h
@@ -46,6 +46,8 @@ enum TiffTags{
     TIFF_PLANAR = 0x11C,
     TIFF_XPOS = 0x11E,
     TIFF_YPOS = 0x11F,
+    TIFF_T4OPTIONS = 0x124,
+    TIFF_T6OPTIONS,
     TIFF_RES_UNIT = 0x128,
     TIFF_SOFTWARE_NAME = 0x131,
     TIFF_PREDICTOR = 0x13D,