diff --git a/techlibs/xilinx/synth_xilinx.cc b/techlibs/xilinx/synth_xilinx.cc
index 53eee7962..58dd928a0 100644
--- a/techlibs/xilinx/synth_xilinx.cc
+++ b/techlibs/xilinx/synth_xilinx.cc
@@ -275,7 +275,6 @@ struct SynthXilinxPass : public Pass
 				Pass::call(design, "techmap -map +/xilinx/arith_map.v");
 			}
 
-			Pass::call(design, "hierarchy -check");
 			Pass::call(design, "opt -fast");
 		}