diff --git a/dv/uvm/env/core_ibex_env_cfg.sv b/dv/uvm/env/core_ibex_env_cfg.sv
index 988de600..dd0e4e96 100644
--- a/dv/uvm/env/core_ibex_env_cfg.sv
+++ b/dv/uvm/env/core_ibex_env_cfg.sv
@@ -9,6 +9,7 @@ class core_ibex_env_cfg extends uvm_object;
   bit       enable_debug_single_seq;
   bit[31:0] max_interval;
   bit       require_signature_addr;
+  string    signature_addr_str;
   bit[31:0] signature_addr;
 
   `uvm_object_utils_begin(core_ibex_env_cfg)
@@ -27,7 +28,8 @@ class core_ibex_env_cfg extends uvm_object;
     void'($value$plusargs("enable_debug_single_seq=%0d", enable_debug_single_seq));
     void'($value$plusargs("max_interval=%0d", max_interval));
     void'($value$plusargs("require_signature_addr=%0d", require_signature_addr));
-    void'($value$plusargs("signature_addr=%0h", signature_addr));
+    void'($value$plusargs("signature_addr=%s", signature_addr_str));
+    signature_addr = signature_addr_str.atohex();
   endfunction
 
 endclass