--- src/X3D_x3d.c.orig	Mon Mar  8 21:27:45 1999
+++ src/X3D_x3d.c	Sat Mar 13 18:57:20 1999
@@ -1053,9 +1053,15 @@
 
 /* An 16 bit TrueColor ? */
 
+#if defined(__linux)
+#define SIXTEEN  15
+
+       if(XMatchVisualInfo(g->dpy, screen, 15, TrueColor, &vInfo)){
+#else
 #define SIXTEEN  16
 
        if(XMatchVisualInfo(g->dpy, screen, 16, TrueColor, &vInfo)){
+#endif
          g->depth = SIXTEEN;
        }else{