diff --git a/src/cmd/componentize.js b/src/cmd/componentize.js
index 38d453024..b17107379 100644
--- a/src/cmd/componentize.js
+++ b/src/cmd/componentize.js
@@ -27,6 +27,7 @@ export async function componentize(jsSource, opts) {
             disableFeatures: opts.disable,
             enableFeatures: opts.enable,
             preview2Adapter: opts.preview2Adapter,
+            debugBuild: opts.debugStarlingmonkeyBuild,
         });
         component = result.component;
     } catch (err) {
diff --git a/src/jco.js b/src/jco.js
index 3bf212a06..846ce04c0 100755
--- a/src/jco.js
+++ b/src/jco.js
@@ -41,6 +41,7 @@ program.command('componentize')
   .addOption(new Option('-d, --disable <feature...>', 'disable WASI features').choices(['clocks', 'http', 'random', 'stdio', 'all']))
   // .addOption(new Option('-e, --enable <feature...>', 'enable WASI features').choices(['http']))
   .option('--preview2-adapter <adapter>', 'provide a custom preview2 adapter path')
+  .option('--debug-starlingmonkey-build', 'use a debug build of StarlingMonkey')
   .requiredOption('-o, --out <out>', 'output component file')
   .action(asyncAction(componentize));