--- kstars/skyobjects/ksmoon.cpp.orig	2013-01-26 22:00:10.000000000 +0900
+++ kstars/skyobjects/ksmoon.cpp	2013-02-16 14:15:00.000000000 +0900
@@ -222,7 +222,7 @@
     // relevant data put into ksplanetbase.h) was taken from
     // SkyChart v3 Beta
     double phd = phase().Degrees();
-    if( isnan( phd ) ) // Avoid nanny phases.
+    if( std::isnan( phd ) ) // Avoid nanny phases.
         return;
     int p = floor( phd );
     if( p > 180 )