diff --git a/fuzzers/030-iob/generate.py b/fuzzers/030-iob/generate.py
index 946cdee6..53d41f3f 100644
--- a/fuzzers/030-iob/generate.py
+++ b/fuzzers/030-iob/generate.py
@@ -22,7 +22,7 @@ for l in f:
     PULLDOWN
     PULLUP          X   X
     '''
-    segmk.add_site_tag(site, "PULL.NONE", val in ("NONE", "KEEPER", "PULLUP"))
+    segmk.add_site_tag(site, "PULL.NONE", val in ("", "KEEPER", "PULLUP"))
 
 segmk.compile()
 segmk.write()
diff --git a/fuzzers/030-iob/generate.tcl b/fuzzers/030-iob/generate.tcl
index 1ecfb9f9..7d111506 100644
--- a/fuzzers/030-iob/generate.tcl
+++ b/fuzzers/030-iob/generate.tcl
@@ -46,28 +46,24 @@ proc loc_pins {} {
 
         # Have: site
         # Want: pin for site
-
         set site [get_sites $site_str]
         set pad_bel [get_bels -of_objects $site -filter {TYPE =~ PAD && NAME =~ IOB_*}]
         # set port [get_ports -of_objects $site]
         set port [get_ports $pin_str]
         set tile [get_tiles -of_objects $site]
-
-        set pin "FIXME"
         set pin [dict get $io_pin_sites $site]
-        #set pin [get_property PACKAGE_PIN $port]
-
-        #set cell [get_cells $cell_str]
-        # puts "LOCing cell $cell to site $site (from bel $pad_bel)"
-        # set_property LOC $site $cell
 
         set_property -dict "PACKAGE_PIN $pin IOSTANDARD LVCMOS33" $port
 
-
         # list_property isn't working
         # set keys [list_property_value PULLTYPE $port]
         set keys "PULLUP PULLDOWN KEEPER"
+        # set keys "NONE KEEPER"
         set val [randsample_list 1 $keys]
+        if { $val == "NONE" } {
+            set val ""
+        }
+
         set_property PULLTYPE $val $port
         # puts "IOB $port $site $tile $pin $val"
         puts $fp "$port,$site,$tile,$pin,$val"