diff --git a/scripts/proguard.pro b/scripts/proguard.pro
index af920a59..ce92b30a 100644
--- a/scripts/proguard.pro
+++ b/scripts/proguard.pro
@@ -381,3 +381,5 @@
     public java.lang.String substring(int);
     public java.lang.String substring(int,int);
 }
+
+-printmapping mapping.txt