diff --git a/configure.ac b/configure.ac
index 593017bc..def4bfd6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -89,7 +89,7 @@ AC_ARG_ENABLE(pamuserpass, AS_HELP_STRING([--enable-pamuserpass],
               [], [enable_pamuserpass=no])
 AM_CONDITIONAL(SESMAN_PAMUSERPASS, [test x$enable_pamuserpass = xyes])
 AC_ARG_ENABLE(pam-config, AS_HELP_STRING([--enable-pam-config=CONF],
-              [Select PAM config to install: debian, redhat, suse, unix
+              [Select PAM config to install: debian, redhat, suse, freebsd, unix
                (default: autodetect)]))
 
 AC_ARG_ENABLE(xrdpdebug, AS_HELP_STRING([--enable-xrdpdebug],
diff --git a/instfiles/pam.d/Makefile.am b/instfiles/pam.d/Makefile.am
index d28a18e4..6cc6bddf 100644
--- a/instfiles/pam.d/Makefile.am
+++ b/instfiles/pam.d/Makefile.am
@@ -2,6 +2,7 @@ PAM_FILES = \
   xrdp-sesman.debian \
   xrdp-sesman.redhat \
   xrdp-sesman.suse \
+  xrdp-sesman.freebsd \
   xrdp-sesman.unix
 
 EXTRA_DIST = $(PAM_FILES) mkpamrules
diff --git a/instfiles/pam.d/mkpamrules b/instfiles/pam.d/mkpamrules
index e2cfb77b..88444205 100755
--- a/instfiles/pam.d/mkpamrules
+++ b/instfiles/pam.d/mkpamrules
@@ -25,6 +25,11 @@ guess_rules ()
     return
   fi
 
+  if test ! -f "$pamdir/system-auth" -a -s "$pamdir/system"; then
+    rules="freebsd"
+    return
+  fi
+
   rules="unix"
   return
 }
diff --git a/instfiles/pam.d/xrdp-sesman.freebsd b/instfiles/pam.d/xrdp-sesman.freebsd
new file mode 100644
index 00000000..212acbfc
--- /dev/null
+++ b/instfiles/pam.d/xrdp-sesman.freebsd
@@ -0,0 +1,5 @@
+#%PAM-1.0
+auth        include     system
+account     include     system
+password    include     system
+session     include     system