only build plugin_common if FLaC__HAVE_XMMS
diff --git a/src/Makefile.am b/src/Makefile.am
index a21afca..0b5b5a4 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -16,7 +16,7 @@
 #  distribution.
 
 if FLaC__HAS_XMMS
-XMMS_DIRS = plugin_xmms
+XMMS_DIRS = plugin_common plugin_xmms
 endif
 
 if FLaC__HAS_OGG
@@ -32,7 +32,6 @@
 	flac \
 	metaflac \
 	monkeys_audio_utilities \
-	plugin_common \
 	$(XMMS_DIRS) \
 	plugin_winamp2 \
 	test_grabbag \