diff --git a/metadata/org.gege.caldavsyncadapter.txt b/metadata/org.gege.caldavsyncadapter.txt
index 77b00f3c24..f9ccf6b252 100644
--- a/metadata/org.gege.caldavsyncadapter.txt
+++ b/metadata/org.gege.caldavsyncadapter.txt
@@ -20,7 +20,7 @@ Repo Type:git
 Repo:https://github.com/gggard/AndroidCaldavSyncAdapater.git
 
 Build Version:1.6,7,v1.6,subdir=CalDAVSyncAdapter,prebuild=\
-sed -i 's@/libs/@libs/@' proguard-project.txt
+sed -i '/proguard/d' project.properties
 
 Auto Update Mode:None
 Update Check Mode:Tags