--- ray/src/rt/rayinit.cal	1992/10/21 11:20:26	2.5
+++ ray/src/rt/rayinit.cal	1993/03/18 12:36:03	2.6
@@ -138,7 +138,7 @@ un2`private(t) : t - (2.515517+t*(.802853+t*.010328))/
 		(1+t*(1.432788+t*(.189269+t*.001308))) ;
 un1`private(p) : un2`private(sqrt(-2*log(p))) ;
 
-unif2norm(p) : if( .5-p, un1`private(p), -un1`private(1-p) ) ;
+unif2norm(p) : if( .5-p, -un1`private(p), un1`private(1-p) ) ;
 
 nrand(x) = unif2norm(rand(x));