diff --git a/main.c b/main.c
index 548b494..30480d1 100644
--- a/main.c
+++ b/main.c
@@ -29,6 +29,12 @@ void drop_root(void) {
       printf("Failed to drop root privileges with setegid (%d)\n", err);
       exit(err);
     }
+
+  // sanity check
+  if(seteuid(0) != -1) {
+    printf("Sanity check failed. I was able to regain root.\n");
+    exit(1);
+  }
 }
 
 void forward_signal(int sig)