diff --git a/lib/msun/tests/trig_test.c b/lib/msun/tests/trig_test.c
index a7ed2fef276..ad697606a23 100644
--- a/lib/msun/tests/trig_test.c
+++ b/lib/msun/tests/trig_test.c
@@ -162,6 +162,11 @@ ATF_TC_BODY(reduction, tc)
 	};
 #endif
 
+#if defined(__clang__) && \
+	((__clang_major__ >= 5))
+	atf_tc_expect_fail("test fails with clang 5.0+ - bug 220989");
+#endif
+
 	unsigned i;
 
 	for (i = 0; i < nitems(f_pi_odd); i++) {