diff --git a/src/goodbyedpi.h b/src/goodbyedpi.h
index 5dd3d47..a5879fc 100644
--- a/src/goodbyedpi.h
+++ b/src/goodbyedpi.h
@@ -1,11 +1,11 @@
 #define HOST_MAXLEN 253
 #define MAX_PACKET_SIZE 9016
 
-#ifndef DEBUG
-#define debug(...) do {} while (0)
-#else
-#define debug(...) printf(__VA_ARGS__)
-#endif
-
+// #ifndef DEBUG
+// #define debug(...) do {} while (0)
+// #else
+// #define debug(...) printf(__VA_ARGS__)
+// #endif
+#define debug(...) if (getenv("DEBUG_GDPI")!=NULL) printf(__VA_ARGS__)
 int main(int argc, char *argv[]);
 void deinit_all();