diff --git a/bochs-testing/plugin-test/common-make-defs.txt b/bochs-testing/plugin-test/common-make-defs.txt
index 8c74e4d8d..68a2e6ed5 100644
--- a/bochs-testing/plugin-test/common-make-defs.txt
+++ b/bochs-testing/plugin-test/common-make-defs.txt
@@ -9,4 +9,4 @@ uselib.out.expected::
 	-./uselib | ${top_srcdir}/filter-test-output > uselib.out.expected
 
 clean-common::
-	rm -rf .libs *.o *.lo *.la *.dll uselib uselib.exe bin lib uselib.out uselib.out.diffs *.def *.exp
+	rm -rf .libs *.o *.lo *.la *.dll uselib uselib.exe bin lib uselib.out uselib.out.diffs *.def *.exp core