diff --git a/.gitignore b/.gitignore
index dc9d2e32..447db337 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,6 +16,7 @@ test/fixtures/ts/node_modules/aliyun-egg/
 !test/fixtures/egg-require/node_modules/
 test/fixtures/example-ts-ets/typings/
 !test/fixtures/example-ts-ets/node_modules/
+!test/fixtures/example-ts-simple/node_modules/
 
 
 **/run/*.json
diff --git a/lib/command.js b/lib/command.js
index 9f78ae71..e166a022 100644
--- a/lib/command.js
+++ b/lib/command.js
@@ -62,26 +62,26 @@ class Command extends BaseCommand {
     if (!path.isAbsolute(baseDir)) baseDir = path.join(cwd, baseDir);
     const pkgFile = path.join(baseDir, 'package.json');
     const pkgInfo = fs.existsSync(pkgFile) ? require(pkgFile) : null;
-    const eggInfo = pkgInfo && pkgInfo.egg;
+    const eggInfo = (pkgInfo && pkgInfo.egg) || {};
     execArgvObj.require = execArgvObj.require || [];
 
     // read `egg.typescript` from package.json if not pass argv
-    if (argv.typescript === undefined && eggInfo) {
-      argv.typescript = eggInfo.typescript === true;
+    if (argv.typescript === undefined && typeof eggInfo.typescript === 'boolean') {
+      argv.typescript = eggInfo.typescript;
     }
 
     // read `egg.declarations` from package.json if not pass argv
-    if (argv.declarations === undefined && eggInfo) {
-      argv.declarations = eggInfo.declarations === true;
+    if (argv.declarations === undefined && typeof eggInfo.declarations === 'boolean') {
+      argv.declarations = eggInfo.declarations;
     }
 
     // read `egg.tscompiler` from package.json if not pass argv
-    if (argv.tscompiler === undefined && eggInfo) {
+    if (argv.tscompiler === undefined) {
       argv.tscompiler = eggInfo.tscompiler || 'ts-node/register';
     }
 
     // read `egg.require` from package.json
-    if (eggInfo && eggInfo.require && Array.isArray(eggInfo.require)) {
+    if (eggInfo.require && Array.isArray(eggInfo.require)) {
       execArgvObj.require = execArgvObj.require.concat(eggInfo.require);
     }
 
diff --git a/test/fixtures/example-ts-simple/config/config.default.ts b/test/fixtures/example-ts-simple/config/config.default.ts
new file mode 100644
index 00000000..feefe62a
--- /dev/null
+++ b/test/fixtures/example-ts-simple/config/config.default.ts
@@ -0,0 +1,3 @@
+'use strict';
+
+export const key = '12345';
diff --git a/test/fixtures/example-ts-simple/node_modules/egg/index.js b/test/fixtures/example-ts-simple/node_modules/egg/index.js
new file mode 100644
index 00000000..9995e5bd
--- /dev/null
+++ b/test/fixtures/example-ts-simple/node_modules/egg/index.js
@@ -0,0 +1,8 @@
+'use strict';
+
+module.exports = require('../../../../../node_modules/egg');
+
+setTimeout(() => {
+  console.log('exit by master test end');
+  process.exit(0);
+}, 6000);
diff --git a/test/fixtures/example-ts-simple/node_modules/egg/package.json b/test/fixtures/example-ts-simple/node_modules/egg/package.json
new file mode 100644
index 00000000..6697ad3f
--- /dev/null
+++ b/test/fixtures/example-ts-simple/node_modules/egg/package.json
@@ -0,0 +1,3 @@
+{
+  "name": "egg"
+}
diff --git a/test/fixtures/example-ts-simple/package.json b/test/fixtures/example-ts-simple/package.json
new file mode 100644
index 00000000..8389bd69
--- /dev/null
+++ b/test/fixtures/example-ts-simple/package.json
@@ -0,0 +1,3 @@
+{
+  "name": "example"
+}
\ No newline at end of file
diff --git a/test/ts.test.js b/test/ts.test.js
index 4a9f3067..5469a812 100644
--- a/test/ts.test.js
+++ b/test/ts.test.js
@@ -152,6 +152,21 @@ describe('test/ts.test.js', () => {
         .end();
     });
 
+    it('should start app with flags in app without eggInfo', async () => {
+      const cwd = path.join(__dirname, './fixtures/example-ts-simple');
+      await coffee.fork(eggBin, [ 'dev', '--ts' ], { cwd })
+        // .debug()
+        .expect('stdout', /started/)
+        .expect('code', 0)
+        .end();
+
+      await coffee.fork(eggBin, [ 'dev', '--ts', '--tsc=esbuild-register' ], { cwd })
+        // .debug()
+        .expect('stdout', /started/)
+        .expect('code', 0)
+        .end();
+    });
+
     it('should start app with other tscompiler without error', () => {
       return coffee.fork(eggBin, [ 'dev', '--ts', '--tscompiler=esbuild-register' ], {
         cwd: path.join(__dirname, './fixtures/example-ts'),