diff --git a/gr-uhd/grc/gen_uhd_usrp_blocks.py b/gr-uhd/grc/gen_uhd_usrp_blocks.py
index 25b0a4c..e392f6a 100644
--- a/gr-uhd/grc/gen_uhd_usrp_blocks.py
+++ b/gr-uhd/grc/gen_uhd_usrp_blocks.py
@@ -25,6 +25,7 @@ MAIN_TMPL = """\
        <key>uhd_usrp_$(sourk)</key>
        <throttle>1</throttle>
        <import>from gnuradio import uhd</import>
+       <import>import time</import>
        <make>uhd.usrp_$(sourk)(
        device_addr=\$dev_addr,
        stream_args=uhd.stream_args(
@@ -56,8 +57,10 @@ self.\$(id).set_subdev_spec(\$sd_spec$(m), $m)
 \#end if
 ########################################################################
 #end for
-\#if \$sync()
+\#if \$sync() == 'sync'
 self.\$(id).set_time_unknown_pps(uhd.time_spec())
+\#elif \$sync() == 'pc_clock'
+self.\$(id).set_time_now(uhd.time_spec(time.time()), uhd.ALL_MBOARDS)
 \#end if
 self.\$(id).set_samp_rate(\$samp_rate)
 #for $n in range($max_nchan)
@@ -166,6 +169,10 @@ self.\$(id).set_bandwidth(\$bw$(n), $n)
                        <key>sync</key>
                </option>
                <option>
+                       <name>PC Clock</name>
+                       <key>pc_clock</key>
+               </option>
+               <option>
                        <name>don't sync</name>
                        <key></key>
                </option>