diff --git a/libavcodec/rv30.c b/libavcodec/rv30.c
index 5bfc4d6858..81a11e8ada 100644
--- a/libavcodec/rv30.c
+++ b/libavcodec/rv30.c
@@ -142,4 +142,5 @@ AVCodec rv30_decoder = {
     NULL,
     ff_rv34_decode_end,
     ff_rv34_decode_frame,
+    CODEC_CAP_DR1 | CODEC_CAP_DELAY,
 };
diff --git a/libavcodec/rv40.c b/libavcodec/rv40.c
index 791ed17901..83cfbadaf8 100644
--- a/libavcodec/rv40.c
+++ b/libavcodec/rv40.c
@@ -272,4 +272,5 @@ AVCodec rv40_decoder = {
     NULL,
     ff_rv34_decode_end,
     ff_rv34_decode_frame,
+    CODEC_CAP_DR1 | CODEC_CAP_DELAY,
 };