diff --git a/lib/CPUs/JCpu/tools/jasm.rb b/lib/CPUs/JCpu/tools/jasm.rb
index 88ba703..7bb7238 100644
--- a/lib/CPUs/JCpu/tools/jasm.rb
+++ b/lib/CPUs/JCpu/tools/jasm.rb
@@ -33,7 +33,7 @@ XROM_MAX_SIZE = 256
 XROM_DATA_TYPE = "dmem_data_t"
 XROM_ADDR_TYPE = "dmem_addr_t"
 XROM_ENTITY_NAME = "xrom"
-OPC_LIST_NAME = "opc.list"
+OPC_LIST_NAME = __dir__ + "/opc.list"
 
 # --------------------------------------------------------
 class Parser