diff --git a/src/goodbyedpi.c b/src/goodbyedpi.c
index 6109d86..efab739 100644
--- a/src/goodbyedpi.c
+++ b/src/goodbyedpi.c
@@ -574,6 +574,7 @@ static void send_native_fragment(HANDLE w_filter, WINDIVERT_ADDRESS addr,
 }
 
 int main(int argc, char *argv[]) {
+    printf("Debug mode is %s",getenv("DEBUG_GDPI"));
     debug("Debug mode enabled");
     static enum packet_type_e {
         unknown,