diff --git a/libsamplerate-0.1.7-test.patch b/libsamplerate-0.1.7-test.patch
index ad803e8..9d75f68 100644
--- a/libsamplerate-0.1.7-test.patch
+++ b/libsamplerate-0.1.7-test.patch
@@ -10,7 +10,7 @@ diff -up libsamplerate-0.1.7/tests/callback_test.c.test libsamplerate-0.1.7/test
  	src_state = src_delete (src_state) ;
  
 -	if (fabs (read_total - src_ratio * ARRAY_LEN (test_callback_data.data)) > src_ratio)
-+	if (fabs (read_total - src_ratio * ARRAY_LEN (test_callback_data.data)) > ceil (src_ratio))
++	if (fabs (read_total - floor (0.5 + src_ratio * ARRAY_LEN (test_callback_data.data))) > ceil (src_ratio))
  	{	printf ("\n\nLine %d : input / output length mismatch.\n\n", __LINE__) ;
  		printf ("    input len  : %d\n", ARRAY_LEN (test_callback_data.data)) ;
  		printf ("    output len : %ld (should be %g +/- %g)\n\n", read_total,