diff --git a/import/Makefile.am b/import/Makefile.am
index fa0218f..1e3e27f 100644
--- a/import/Makefile.am
+++ b/import/Makefile.am
@@ -116,7 +116,7 @@ a52_decode_la_CPPFLAGS = $(AM_CPPFLAGS) $(A52_CFLAGS)
 a52_decore_la_LDFLAGS = -module -avoid-version
 a52_decore_la_LIBADD = $(A52_LIBS) $(XIO_LIBS)
 
-import_ac3_la_SOURCES = import_ac3.c
+import_ac3_la_SOURCES = import_ac3.c ac3scan.c
 import_ac3_la_LDFLAGS = -module -avoid-version
 
 import_alsa_la_SOURCES = import_alsa.c