diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index a6e79ce7c3..7396468f45 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -905,7 +905,7 @@ OBJS-$(CONFIG_LIBX264_ENCODER)            += libx264.o
 OBJS-$(CONFIG_LIBX265_ENCODER)            += libx265.o
 OBJS-$(CONFIG_LIBXAVS_ENCODER)            += libxavs.o
 OBJS-$(CONFIG_LIBXVID_ENCODER)            += libxvid.o
-OBJS-$(CONFIG_LIBZVBI_TELETEXT_DECODER)   += libzvbi-teletextdec.o
+OBJS-$(CONFIG_LIBZVBI_TELETEXT_DECODER)   += libzvbi-teletextdec.o ass.o
 
 # parsers
 OBJS-$(CONFIG_AAC_LATM_PARSER)         += latm_parser.o