diff --git a/include/ariane_pkg.sv b/include/ariane_pkg.sv
index 9e73fb797bf498a31ad5690a09d0c2c89d582bc4..290219e3fca5d2ab86a10fc46f9f443dc665b72a 100644
--- a/include/ariane_pkg.sv
+++ b/include/ariane_pkg.sv
@@ -219,7 +219,7 @@ package ariane_pkg;
                                      | ((riscv::XLEN == 64 ? 2 : 1) << riscv::XLEN-2);  // MXL
 
     // 32 registers + 1 bit for re-naming = 6
-    localparam REG_ADDR_SIZE = 6;
+    localparam REG_ADDR_SIZE = (ENABLE_RENAME) ? 6 : 5;
     localparam NR_WB_PORTS = 5;
 
     // static debug hartinfo