diff --git a/opengl/libs/glesv2dbg.h b/opengl/libs/glesv2dbg.h
index 2d3a0f6..ee2c011 100644
--- a/opengl/libs/glesv2dbg.h
+++ b/opengl/libs/glesv2dbg.h
@@ -28,7 +28,10 @@
 
 void DestroyDbgContext(DbgContext * const dbg);
 
-void StartDebugServer(unsigned short port); // create and bind socket if haven't already
+// create and bind socket if haven't already, if failed to create socket or
+//  forceUseFile, then open /data/local/tmp/dump.gles2dbg, exit when size reached
+void StartDebugServer(const unsigned short port, const bool forceUseFile,
+                      const unsigned int maxFileSize, const char * const filePath);
 void StopDebugServer(); // close socket if open
 
 }; // namespace android