$OpenBSD$
--- simgear/sound/sample_group.cxx.orig	Mon Feb 18 15:58:14 2013
+++ simgear/sound/sample_group.cxx	Fri Jul  5 11:18:56 2013
@@ -36,7 +36,7 @@
 using std::string;
 
 bool isNaN(float *v) {
-   return (isnan(v[0]) || isnan(v[1]) || isnan(v[2]));
+   return (std::isnan(v[0]) || std::isnan(v[1]) || std::isnan(v[2]));
 }
 
 SGSampleGroup::SGSampleGroup () :