diff --git a/xc/common/utils/vivado_create_runme.py b/xc/common/utils/vivado_create_runme.py
index 27ed75f4c1..94c33f4e6b 100644
--- a/xc/common/utils/vivado_create_runme.py
+++ b/xc/common/utils/vivado_create_runme.py
@@ -10,7 +10,7 @@ def create_runme(f_out, args):
 create_project -force -part {part} design design
 
 read_verilog {bit_v}
-synth_design -top {top}
+synth_design -top {top} -bufg 0
 
 write_checkpoint -force design_{name}_pre_source.dcp