diff --git a/libavformat/assdec.c b/libavformat/assdec.c
index 5f8e0b96be..676fb39d6c 100644
--- a/libavformat/assdec.c
+++ b/libavformat/assdec.c
@@ -177,7 +177,7 @@ static int read_packet(AVFormatContext *s, AVPacket *pkt)
 
 AVInputFormat ass_demuxer = {
     "ass",
-    NULL_IF_CONFIG_SMALL("SSA/ASS format"),
+    NULL_IF_CONFIG_SMALL("Advanced SubStation Alpha subtitle format"),
     sizeof(ASSContext),
     probe,
     read_header,
diff --git a/libavformat/assenc.c b/libavformat/assenc.c
index d1b93e82ef..41d5bbdca8 100644
--- a/libavformat/assenc.c
+++ b/libavformat/assenc.c
@@ -79,7 +79,7 @@ static int write_trailer(AVFormatContext *s)
 
 AVOutputFormat ass_muxer = {
     "ass",
-    NULL_IF_CONFIG_SMALL("SSA/ASS format"),
+    NULL_IF_CONFIG_SMALL("Advanced SubStation Alpha subtitle format"),
     NULL,
     "ass,ssa",
     sizeof(ASSContext),