diff --git a/.gitignore b/.gitignore
index 20624e5b..562b2ee7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -127,3 +127,6 @@ captures/
 # Android Profiling
 *.hprof
 client/3rd/ShadowSocks/ss_ios.xcconfig
+
+# UML generated pics
+out/
\ No newline at end of file
diff --git a/deploy/installer/config/controlscript.js b/deploy/installer/config/controlscript.js
index 9be76c15..df7cefee 100644
--- a/deploy/installer/config/controlscript.js
+++ b/deploy/installer/config/controlscript.js
@@ -26,7 +26,7 @@ function appInstalled()
     } else if (runningOnMacOS()){
         appInstalledUninstallerPath = "/Applications/" + appName() + ".app/maintenancetool.app/Contents/MacOS/maintenancetool";
     } else if (runningOnLinux()){
-	allInstalledUninstallerPath = "/opt/" + appName();
+	    appInstalledUninstallerPath = "/opt/" + appName();
     }
 
     return installer.fileExists(appInstalledUninstallerPath) || installer.fileExists(appInstalledUninstallerPath_x86);