diff --git a/Makefile.am b/Makefile.am
index 195622c38f..6e48652ba2 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -207,7 +207,7 @@ test_dash_filtered.info: test_dash.info
 	$(LCOV) -a $@ $(LCOV_OPTS) -o $@
 
 functional_test.info: test_dash_filtered.info
-	-@TIMEOUT=15 test/functional/test_runner.py $(EXTENDED_FUNCTIONAL_TESTS)
+	@TIMEOUT=15 test/functional/test_runner.py $(EXTENDED_FUNCTIONAL_TESTS)
 	$(LCOV) -c $(LCOV_OPTS) -d $(abs_builddir)/src --t functional-tests -o $@
 	$(LCOV) -z $(LCOV_OPTS) -d $(abs_builddir)/src