diff --git a/bochs-testing/plugin-test/common-make-defs.txt b/bochs-testing/plugin-test/common-make-defs.txt
index 6fff40458..744c79564 100644
--- a/bochs-testing/plugin-test/common-make-defs.txt
+++ b/bochs-testing/plugin-test/common-make-defs.txt
@@ -6,7 +6,7 @@ test:
 	@echo "*** Test done in `pwd`"
 
 uselib.out.expected::
-	-./uselib | ../filter-test-output > 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