diff --git a/tools/build/options/WITH_CTF b/tools/build/options/WITH_CTF
new file mode 100644
index 00000000000..80856327e21
--- /dev/null
+++ b/tools/build/options/WITH_CTF
@@ -0,0 +1,4 @@
+.\" $FreeBSD$
+Set to compile with CTF (Compact C Type Format) data.
+CTF data encapsulates a reduced form of debugging information
+similar to DWARF and the venerable stabs and is required for DTrace.