diff --git a/f_check b/f_check
index 79febfb..c9da6ed 100644
--- a/f_check
+++ b/f_check
@@ -359,9 +359,6 @@ print MAKEFILE "NOFORTRAN=1\n" if $nofortran == 1;
 
 print CONFFILE "#define BUNDERSCORE\t$bu\n" if $bu ne "";
 print CONFFILE "#define NEEDBUNDERSCORE\t1\n" if $bu ne "";
-print CONFFILE "#define NEED2UNDERSCORES\t1\n" if $need2bu ne "";
-
-print MAKEFILE "NEED2UNDERSCORES=1\n" if $need2bu ne "";
 
 if (($linker_l ne "") || ($linker_a ne "")) {
     print MAKEFILE "FEXTRALIB=$linker_L $linker_l $linker_a\n";