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-rw-r--r--math/libm-test.inc1
1 files changed, 1 insertions, 0 deletions
diff --git a/math/libm-test.inc b/math/libm-test.inc
index 744c66dbb1..8615957600 100644
--- a/math/libm-test.inc
+++ b/math/libm-test.inc
@@ -1790,6 +1790,7 @@ static const struct test_f_f_data acosh_test_data[] =
     TEST_f_f (acosh, plus_infty, plus_infty, ERRNO_UNCHANGED),
     TEST_f_f (acosh, minus_infty, qnan_value, INVALID_EXCEPTION|ERRNO_EDOM),
     TEST_f_f (acosh, qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_f_f (acosh, -qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 
     /* x < 1:  */
     TEST_f_f (acosh, 0.75L, qnan_value, INVALID_EXCEPTION|ERRNO_EDOM),