diff --git a/android-project/app/proguard-rules.pro b/android-project/app/proguard-rules.pro
index fc0a4f5c92..1eeb90e2c3 100644
--- a/android-project/app/proguard-rules.pro
+++ b/android-project/app/proguard-rules.pro
@@ -36,6 +36,7 @@
     int messageboxShowMessageBox(int, java.lang.String, java.lang.String, int[], int[], java.lang.String[], int[]);
     void minimizeWindow();
     boolean openURL(java.lang.String);
+    void onNativePen(int, int, int , float , float , float);
     void requestPermission(java.lang.String, int);
     boolean showToast(java.lang.String, int, int, int, int);
     boolean sendMessage(int, int);