diff --git a/src/plugins/lib/Makefile.am b/src/plugins/lib/Makefile.am
index d05bc0b49..cd7d798c4 100644
--- a/src/plugins/lib/Makefile.am
+++ b/src/plugins/lib/Makefile.am
@@ -46,7 +46,7 @@ DATAFILES = \
 dist_pkgdata_DATA = $(GLADEFILES) $(GRAPHICS) $(DATAFILES)
 
 CLEANFILES = \
-    $(xml_DATA)
+    $(xml_files)
 
 # Clean up all the byte-compiled files
 MOSTLYCLEANFILES = *pyc *pyo