diff --git a/gnulib-tests/Makefile.am b/gnulib-tests/Makefile.am
index 6635f70..f68911f 100644
--- a/gnulib-tests/Makefile.am
+++ b/gnulib-tests/Makefile.am
@@ -1 +1,3 @@
+AM_CFLAGS =
+
 include gnulib.mk