diff --git a/build.gradle b/build.gradle
index ad11b381..9332fe63 100644
--- a/build.gradle
+++ b/build.gradle
@@ -168,7 +168,7 @@ modules_oamp_all.split(',').each{ moduleName ->
                 // to clean the output directory, delete it first
                 def dir = file(buildDir)
                 if (dir.exists()){
-                    delete{ delete dir }
+                    delete dir
                 }
                 dir.mkdirs()
             }
@@ -313,4 +313,4 @@ install {
             }
         }
     }
-}
\ No newline at end of file
+}