--- ray/src/common/tcos.c	2013/02/08 16:10:07	3.8
+++ ray/src/common/tcos.c	2013/02/08 16:39:01	3.9
@@ -1,5 +1,5 @@
 #ifndef lint
-static const char	RCSid[] = "$Id: tcos.c,v 3.8 2013/02/08 16:10:07 greg Exp $";
+static const char	RCSid[] = "$Id: tcos.c,v 3.9 2013/02/08 16:39:01 greg Exp $";
 #endif
 /*
  * Table-based cosine approximation.
@@ -64,7 +64,7 @@ atan2a(double y, double x)
 	aratio = (ratio = y/x) >= 0 ? ratio : -ratio;
 
 	if (aratio > 1.01)
-		return PI/2. - aatan2(x, y);
+		return PI/2. - atan2a(x, y);
 
 	val = PI/4.*ratio - ratio*(aratio - 1.)*(0.2447 + 0.0663*aratio);