diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 2b6fbbca2a..54862171f9 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -242,7 +242,7 @@ OBJS-$(CONFIG_BRENDER_PIX_DECODER)     += brenderpix.o
 OBJS-$(CONFIG_C93_DECODER)             += c93.o
 OBJS-$(CONFIG_CAVS_DECODER)            += cavs.o cavsdec.o cavsdsp.o \
                                           cavsdata.o
-OBJS-$(CONFIG_CCAPTION_DECODER)        += ccaption_dec.o
+OBJS-$(CONFIG_CCAPTION_DECODER)        += ccaption_dec.o ass.o
 OBJS-$(CONFIG_CDGRAPHICS_DECODER)      += cdgraphics.o
 OBJS-$(CONFIG_CDXL_DECODER)            += cdxl.o
 OBJS-$(CONFIG_CFHD_DECODER)            += cfhd.o cfhddata.o