diff --git a/src/rpc/genprotocol.pl b/src/rpc/genprotocol.pl
index 4f8b6c4d0a7b5a3d3c22c7756e3608a4c2d2ca0f..6e6d6d4a93fc74aef956ca2a1ca4fc1dedb90d9e 100755
--- a/src/rpc/genprotocol.pl
+++ b/src/rpc/genprotocol.pl
@@ -43,7 +43,7 @@ open RPCGEN, "-|", $rpcgen, $mode, $xdrdef
 open TARGET, ">$target"
     or die "cannot create $target: $!";
 
-my $fixup = $^O eq "linux" || $^O eq "cygwin" || $^O eq "gnukfreebsd";
+my $fixup = $^O eq "linux" || $^O eq "cygwin" || $^O eq "gnukfreebsd" || $^O eq "freebsd";
 
 if ($mode eq "-c") {
     print TARGET "#include <config.h>\n";