diff --git a/src/modules/cap/Makefile.in b/src/modules/cap/Makefile.in
new file mode 100644
index 000000000..56ee8bdfa
--- /dev/null
+++ b/src/modules/cap/Makefile.in
@@ -0,0 +1,55 @@
+#************************************************************************
+#*   IRC - Internet Relay Chat, src/modules/cap/Makefile
+#*   Copyright (C) The UnrealIRCd team
+#*
+#*   This program is free software; you can redistribute it and/or modify
+#*   it under the terms of the GNU General Public License as published by
+#*   the Free Software Foundation; either version 1, or (at your option)
+#*   any later version.
+#*
+#*   This program is distributed in the hope that it will be useful,
+#*   but WITHOUT ANY WARRANTY; without even the implied warranty of
+#*   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#*   GNU General Public License for more details.
+#*
+#*   You should have received a copy of the GNU General Public License
+#*   along with this program; if not, write to the Free Software
+#*   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+#*/
+
+CC = "==== DO NOT RUN MAKE FROM THIS DIRECTORY ===="
+
+INCLUDES = ../../include/auth.h ../../include/badwords.h ../../include/channel.h \
+	../../include/class.h ../../include/common.h ../../include/config.h ../../include/dbuf.h \
+	../../include/dynconf.h ../../include/events.h ../../include/fdlist.h ../../include/h.h \
+	../../include/hash.h ../../include/inet.h ../../include/ircsprintf.h \
+	../../include/license.h ../../include/macros.h \
+	../../include/modules.h ../../include/modversion.h ../../include/msg.h \
+	../../include/numeric.h ../../include/proto.h ../../include/res.h \
+	../../include/resource.h ../../include/setup.h ../../include/sjoin.h \
+	../../include/sock.h ../../include/ssl.h ../../include/struct.h ../../include/sys.h \
+	../../include/threads.h ../../include/types.h ../../include/url.h \
+	../../include/version.h ../../include/whowas.h
+
+R_MODULES=\
+	sts.so
+
+MODULES=$(R_MODULES)
+MODULEFLAGS=@MODULEFLAGS@
+RM=@RM@
+
+all: build
+
+build: $(MODULES)
+
+clean:
+	$(RM) -f *.o *.so *~ core
+
+#############################################################################
+#             .so's section
+#############################################################################
+
+sts.so: sts.c $(INCLUDES)
+	$(CC) $(CFLAGS) $(MODULEFLAGS) -DDYNAMIC_LINKING \
+		-o sts.so sts.c
+
diff --git a/src/modules/cap/sts.c b/src/modules/cap/sts.c
new file mode 100644
index 000000000..7d6f25c01
--- /dev/null
+++ b/src/modules/cap/sts.c
@@ -0,0 +1,76 @@
+/*
+ *   IRC - Internet Relay Chat, src/modules/sts.c
+ *   (C) 2017 Syzop & The UnrealIRCd Team
+ *
+ *   See file AUTHORS in IRC package for additional names of
+ *   the programmers.
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 1, or (at your option)
+ *   any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "unrealircd.h"
+
+ModuleHeader MOD_HEADER(sts)
+  = {
+	"sts",
+	"4.0",
+	"Strict Transport Security CAP", 
+	"3.2-b8-1",
+	NULL 
+	};
+
+MOD_INIT(sts)
+{
+	MARK_AS_OFFICIAL_MODULE(modinfo);
+
+	return MOD_SUCCESS;
+}
+
+void init_sts(ModuleInfo *modinfo);
+
+MOD_LOAD(sts)
+{
+	/* init_sts is delayed to MOD_LOAD due to configuration dependency */
+	init_sts(modinfo);
+	return MOD_SUCCESS;
+}
+
+MOD_UNLOAD(sts)
+{
+	return MOD_SUCCESS;
+}
+
+int sts_capability_visible(aClient *acptr)
+{
+	return 1;
+}
+
+char *sts_capability_parameter(aClient *acptr)
+{
+	return "port=6697";
+}
+
+void init_sts(ModuleInfo *modinfo)
+{
+	ClientCapability cap;
+
+	memset(&cap, 0, sizeof(cap));
+	cap.name = "draft/sts";
+	cap.cap = 0;
+	cap.flags = CLICAP_FLAGS_ADVERTISE_ONLY;
+	cap.visible = sts_capability_visible;
+	cap.parameter = sts_capability_parameter;
+	ClientCapabilityAdd(modinfo->handle, &cap);
+}