diff --git a/source/Commands/CommandObjectFile.cpp b/source/Commands/CommandObjectFile.cpp
index 01576c5..de40c6e 100644
--- a/source/Commands/CommandObjectFile.cpp
+++ b/source/Commands/CommandObjectFile.cpp
@@ -38,7 +38,7 @@
 lldb::OptionDefinition
 CommandObjectFile::CommandOptions::g_option_table[] =
 {
-    { 0, false, "arch", 'a', required_argument, NULL, 0, "<arch>", "Specify the architecture to launch."},
+    { LLDB_OPT_SET_1, false, "arch", 'a', required_argument, NULL, 0, "<arch>", "Specify the architecture to launch."},
     { 0, false, NULL, 0, 0, NULL, 0, NULL, NULL }
 };