diff --git a/src/pcm/Makefile.am b/src/pcm/Makefile.am
index 148201bd..927560ab 100644
--- a/src/pcm/Makefile.am
+++ b/src/pcm/Makefile.am
@@ -3,7 +3,7 @@ SUBDIRS = plugin
 EXTRA_LTLIBRARIES = libpcm.la
 
 libpcm_la_SOURCES = pcm.c pcm_hw.c pcm_plug.c pcm_common.c \
-	            pcm_misc.c pcm_mmap.c
+	            pcm_misc.c pcm_mmap.c pcm_multi.c
 libpcm_la_LIBADD = plugin/libpcmplugin.la
 noinst_HEADERS = pcm_local.h