--- xutil.c.orig	Thu May  6 12:13:10 1999
+++ xutil.c	Thu May  6 01:41:39 1999
@@ -666,7 +666,7 @@
 
     /*  Look up cached value  */
     for ( i = 0; i < Vlist_len; i++ )
-        if ( Vlist[i].visualid = vi->visualid )
+        if ( Vlist[i].visualid == vi->visualid )
             break;
 
     /*  Didn't have a cached value?  Go figure it out.  */