diff --git a/techlibs/xilinx/cells_sim.v b/techlibs/xilinx/cells_sim.v
index 3ed0759db..56eb782c6 100644
--- a/techlibs/xilinx/cells_sim.v
+++ b/techlibs/xilinx/cells_sim.v
@@ -1185,10 +1185,10 @@ module RAM64M (
   output DOB,
   output DOC,
   output DOD,
-  input [4:0] ADDRA,
-  input [4:0] ADDRB,
-  input [4:0] ADDRC,
-  input [4:0] ADDRD,
+  input [5:0] ADDRA,
+  input [5:0] ADDRB,
+  input [5:0] ADDRC,
+  input [5:0] ADDRD,
   input DIA,
   input DIB,
   input DIC,