diff --git a/tests/Makefile.am b/tests/Makefile.am
index e3c7702..96ffac7 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -46,7 +46,7 @@ coverage-html: clean clean-coverage check
 	$(LCOV) -d $(top_srcdir) \
 		-a ./coverage.base -a ./coverage.run \
 		-o coverage.info
-	LANG=C $(GENHTML) --prefix $(top_srcdir) \
+	LANG=C $(GENHTML) --prefix $(PWD) \
 	     --output-directory $(cov_dir) \
 	     --title "$(PACKAGE_NAME) $(PACKAGE_VERSION)" \
 	     --legend --branch-coverage --show-details coverage.run