diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 433ab4fc66b..bd2d4930ca6 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2008-09-11  Joseph Myers  <joseph@codesourcery.com>
+
+	* gcc.dg/builtins-8.c: Condition cbrt test on HAVE_C99_RUNTIME.
+
 2008-09-11  Paolo Bonzini  <bonzini@gnu.org>
 
 	* gcc.dg/tree-ssa/vrp47.c: New.
diff --git a/gcc/testsuite/gcc.dg/builtins-8.c b/gcc/testsuite/gcc.dg/builtins-8.c
index be17774d526..95c17e72f24 100644
--- a/gcc/testsuite/gcc.dg/builtins-8.c
+++ b/gcc/testsuite/gcc.dg/builtins-8.c
@@ -27,8 +27,10 @@ void test(double x)
   if (pow(x,0.5) != sqrt(x))
     abort ();
 
+#ifdef HAVE_C99_RUNTIME
   if (pow(x,1.0/3.0) != cbrt(x))
     abort ();
+#endif
 }
 
 int main()