--- sys/test.c.orig	2007-06-11 12:57:34.000000000 +0400
+++ sys/test.c	2007-06-11 12:57:52.000000000 +0400
@@ -383,7 +383,7 @@
        negative).  (This is all that C99 requires.) */
 
     s = gsl_isinf (-inf);  
-    gsl_test_int (s, -1, "gsl_isinf(-inf)");
+    gsl_test_int (s, 1, "gsl_isinf(-inf)");
 
     s = gsl_isinf (nan);
     gsl_test_int (s, 0, "gsl_isinf(nan)");