diff --git a/main.lua b/main.lua
index a20eedd..7fe47de 100755
--- a/main.lua
+++ b/main.lua
@@ -6,7 +6,7 @@ local app_yqtemplate = require"yqtemplate"
 
 while fcgi.accept() do
     app = fcgi.getenv("DOCUMENT_URI"):sub(6)
-    if app = "yqtemplate" then
+    if app == "yqtemplate" then
         app_yqtemplate(fcgi)
     else
         fcgi.print"Content-Type: text/plain; charset=utf-8\r\n\r\n"