diff --git a/xc7/picorv32.pcf b/xc7/picorv32.pcf
index 0f023697..bc8e084a 100644
--- a/xc7/picorv32.pcf
+++ b/xc7/picorv32.pcf
@@ -1,3 +1,3 @@
-NET "pll.clkin1" PERIOD = 8 nS ;
-#PIN "clk_pin" = BEL "clk.PAD" PINNAME PAD;
-#PIN "clk_pin" CLOCK_DEDICATED_ROUTE = FALSE;
+NET "clki" PERIOD = 8 nS ;
+PIN "clki_pin" = BEL "clki.PAD" PINNAME PAD;
+PIN "clki_pin" CLOCK_DEDICATED_ROUTE = FALSE;
diff --git a/xc7/picorv32.sh b/xc7/picorv32.sh
index 99860236..ec2aee80 100755
--- a/xc7/picorv32.sh
+++ b/xc7/picorv32.sh
@@ -3,7 +3,9 @@ set -ex
 rm -f picorv32.v
 wget https://raw.githubusercontent.com/cliffordwolf/picorv32/master/picorv32.v
 yosys picorv32.ys
-../nextpnr-xc7 --json picorv32.json --xdl picorv32.xdl --pcf picorv32.pcf --freq 150
+set +e
+../nextpnr-xc7 --json picorv32.json --xdl picorv32.xdl --pcf picorv32.pcf --freq 125
+set -e
 xdl -xdl2ncd picorv32.xdl
 #bitgen -w blinky.ncd -g UnconstrainedPins:Allow
 trce picorv32.ncd -v 10
diff --git a/xc7/picorv32_top.v b/xc7/picorv32_top.v
index 34149622..3735aa1b 100644
--- a/xc7/picorv32_top.v
+++ b/xc7/picorv32_top.v
@@ -1,5 +1,5 @@
 module top (
-	input clk, resetn,
+	input clki, resetn,
 	output trap,
 
 	output        mem_valid,
@@ -12,7 +12,17 @@ module top (
 	input  [31:0] mem_rdata
 );
 
-    clk_wiz_v3_6 pll(.CLK_IN1(clk), .CLK_OUT1(gclk));
+    wire clk;
+    BUFGCTRL clk_gb (
+        .I0(clki),
+        .CE0(1'b1),
+        .CE1(1'b0),
+        .S0(1'b1),
+        .S1(1'b0),
+        .IGNORE0(1'b0),
+        .IGNORE1(1'b0),
+        .O(clk)
+    );
 
     picorv32 #(
         .ENABLE_COUNTERS(0),
@@ -20,7 +30,7 @@ module top (
         .CATCH_MISALIGN(0),
         .CATCH_ILLINSN(0)
     ) cpu (
-        .clk      (gclk     ),
+        .clk      (clk     ),
         .resetn   (resetn   ),
         .trap     (trap     ),
         .mem_valid(mem_valid),