diff --git a/classes/pack_audio_plugins.bbclass b/classes/pack_audio_plugins.bbclass
index 59b3d82f..f7205ebf 100644
--- a/classes/pack_audio_plugins.bbclass
+++ b/classes/pack_audio_plugins.bbclass
@@ -2,7 +2,7 @@
 
 PACKAGES =+ "${PN}-dssi ${PN}-ladspa ${PN}-lv2 ${PN}-vst"
 
-FILES_${PN}-dssi = "${libdir}/dssi"
-FILES_${PN}-ladspa = "${libdir}/ladspa"
-FILES_${PN}-lv2 = "${libdir}/lv2"
-FILES_${PN}-vst = "${libdir}/vst"
+FILES_${PN}-dssi += "${libdir}/dssi"
+FILES_${PN}-ladspa += "${libdir}/ladspa"
+FILES_${PN}-lv2 += "${libdir}/lv2"
+FILES_${PN}-vst += "${libdir}/vst"