diff --git a/tcl/interface/ftdi/olimex-arm-jtag-swd.cfg b/tcl/interface/ftdi/olimex-arm-jtag-swd.cfg
index ee7cdaecd..2153fd65f 100644
--- a/tcl/interface/ftdi/olimex-arm-jtag-swd.cfg
+++ b/tcl/interface/ftdi/olimex-arm-jtag-swd.cfg
@@ -3,5 +3,7 @@
 # https://www.olimex.com/Products/ARM/JTAG/ARM-JTAG-SWD/
 #
 
+transport select swd
+
 ftdi_layout_signal SWD_EN -nalias nTRST
 ftdi_layout_signal SWDIO_OE -alias TMS
diff --git a/tcl/interface/ftdi/rowley-cc-arm-swd.cfg b/tcl/interface/ftdi/rowley-cc-arm-swd.cfg
index 579561eb4..9a96dbd92 100644
--- a/tcl/interface/ftdi/rowley-cc-arm-swd.cfg
+++ b/tcl/interface/ftdi/rowley-cc-arm-swd.cfg
@@ -4,5 +4,7 @@
 # https://drive.google.com/file/d/0Bzv7UpKpOQhnTUNNdzI5OUR4WGs/edit?usp=sharing
 #
 
+transport select swd
+
 ftdi_layout_signal SWD_EN -nalias nTRST
 ftdi_layout_signal SWDIO_OE -alias TMS
diff --git a/tcl/interface/ftdi/swd-resistor-hack.cfg b/tcl/interface/ftdi/swd-resistor-hack.cfg
index a6f3a26c5..784887522 100644
--- a/tcl/interface/ftdi/swd-resistor-hack.cfg
+++ b/tcl/interface/ftdi/swd-resistor-hack.cfg
@@ -4,4 +4,6 @@
 # connect TDO directly to SWDIO.
 #
 
+transport select swd
+
 ftdi_layout_signal SWD_EN -data 0