diff --git a/bin/nroff b/bin/nroff
index 6f7005ff..83eac636 100755
--- a/bin/nroff
+++ b/bin/nroff
@@ -1,3 +1,3 @@
 #!/bin/sh
 
-exec troff -N "$@"
+exec 9 troff -N "$@"