diff --git a/src/common.c b/src/common.c
index f8719df..b965ac9 100644
--- a/src/common.c
+++ b/src/common.c
@@ -101,18 +101,16 @@ int setgroups(int count, int *groups)
 }
 #endif
 
-
-void
-check_superuser(void (*usage_fn)(void))
-{
 #ifndef WINDOWS32
+void
+check_superuser(void)
+{
 	if (geteuid() != 0) {
 		warnx("Run as root and you'll be happy.\n");
-		usage_fn();
-		/* NOTREACHED */
+		exit(-1);
 	}
-#endif
 }
+#endif
 
 char *
 format_addr(struct sockaddr_storage *sockaddr, int sockaddr_len)
diff --git a/src/common.h b/src/common.h
index 2de23e9..5f2c7ad 100644
--- a/src/common.h
+++ b/src/common.h
@@ -102,7 +102,13 @@ enum connection {
 	CONN_MAX
 };
 
-void check_superuser(void (*usage_fn)(void));
+#ifdef WINDOWS32
+static inline void check_superuser(void)
+{
+}
+#else
+void check_superuser(void);
+#endif
 char *format_addr(struct sockaddr_storage *sockaddr, int sockaddr_len);
 int get_addr(char *, int, int, int, struct sockaddr_storage *);
 int open_dns(struct sockaddr_storage *, size_t);
diff --git a/src/iodine.c b/src/iodine.c
index 2599a6d..5c74ddc 100644
--- a/src/iodine.c
+++ b/src/iodine.c
@@ -275,7 +275,7 @@ main(int argc, char **argv)
 		}
 	}
 
-	check_superuser(usage);
+	check_superuser();
 
 	argc -= optind;
 	argv += optind;
diff --git a/src/iodined.c b/src/iodined.c
index c213ec6..8a885d9 100644
--- a/src/iodined.c
+++ b/src/iodined.c
@@ -2537,7 +2537,7 @@ main(int argc, char **argv)
 	argc -= optind;
 	argv += optind;
 
-	check_superuser(usage);
+	check_superuser();
 
 	if (argc != 2)
 		usage();