--- ./README.os2-pre	Wed May 31 17:08:12 2006
+++ ./README.os2	Sat May 27 16:14:52 2006
@@ -35,7 +35,7 @@ Thus the build process may look like thi
 
   sh Configure --graphic=gnuplot.dynamic,gnpltdrw
   cd Oos2-ix86
-  make _O=.obj _A=.lib CC_FLAVOR="-Zomf -Zcrtdll -Zstack 8192 -DOLD_SET_FEEDBACK_RECTANGLE" RLLIBS=-lreadline_import DLLD_IGNORE= AR=emxomfar bench
+  make _O=.obj _A=.lib CC_FLAVOR="-Zomf -Zcrtdll -Zstack 8192 -DUSE_SET_FEEDBACK_RECTANGLE" RLLIBS=-lreadline_import DLLD_IGNORE= AR=emxomfar bench
   cd ..
 
 The statically build PARI library is in a file named similar to libpari-2_2.a,
