diff --git a/source/Commands/CommandObjectDisassemble.cpp b/source/Commands/CommandObjectDisassemble.cpp
index 357ff95..6a29be2 100644
--- a/source/Commands/CommandObjectDisassemble.cpp
+++ b/source/Commands/CommandObjectDisassemble.cpp
@@ -134,7 +134,8 @@
         break;
 
     case 'a':
-            arch.SetTriple (option_arg, m_interpreter.GetPlatform (true).get());
+        if (!arch.SetTriple (option_arg, m_interpreter.GetPlatform (true).get()))
+            arch.SetTriple (option_arg);
         break;
 
     default: