1 files changed, 6 insertions, 2 deletions
diff --git a/src/support/command-line.cpp b/src/support/command-line.cpp
index be5098677..0986a49ff 100644
--- a/src/support/command-line.cpp
+++ b/src/support/command-line.cpp
@@ -16,6 +16,7 @@
 
 #include "support/command-line.h"
 #include "config.h"
+#include "support/debug.h"
 
 using namespace wasm;
 
@@ -91,8 +92,11 @@ Options::Options(const std::string& command, const std::string& description)
   add("--debug",
       "-d",
       "Print debug information to stderr",
-      Arguments::Zero,
-      [&](Options* o, const std::string& arguments) { debug = true; });
+      Arguments::Optional,
+      [&](Options* o, const std::string& arguments) {
+        debug = true;
+        setDebugEnabled(arguments.c_str());
+      });
 }
 
 Options::~Options() {}