diff --git a/etc/defaults/make.conf b/etc/defaults/make.conf
index 37192cc7f2c2..2b976499e7bb 100644
--- a/etc/defaults/make.conf
+++ b/etc/defaults/make.conf
@@ -194,6 +194,11 @@ BDECFLAGS=	-W -Wall -ansi -pedantic -Wbad-function-cast -Wcast-align \
 #
 #LOADER_TFTP_SUPPORT= YES
 #
+# By default, the ports collection attempts to use XFree86 3.3.X.  If
+# you are running XFree86 4.X, uncomment this line.
+#
+#XFREE86_VERSION=	4
+#
 # By default, this points to /usr/X11R6 for XFree86 releases 3.0 or earlier.
 # If you have a XFree86 from before 3.0 that has the X distribution in
 # /usr/X386, you want to uncomment this.
diff --git a/share/examples/etc/make.conf b/share/examples/etc/make.conf
index 37192cc7f2c2..2b976499e7bb 100644
--- a/share/examples/etc/make.conf
+++ b/share/examples/etc/make.conf
@@ -194,6 +194,11 @@ BDECFLAGS=	-W -Wall -ansi -pedantic -Wbad-function-cast -Wcast-align \
 #
 #LOADER_TFTP_SUPPORT= YES
 #
+# By default, the ports collection attempts to use XFree86 3.3.X.  If
+# you are running XFree86 4.X, uncomment this line.
+#
+#XFREE86_VERSION=	4
+#
 # By default, this points to /usr/X11R6 for XFree86 releases 3.0 or earlier.
 # If you have a XFree86 from before 3.0 that has the X distribution in
 # /usr/X386, you want to uncomment this.