diff --git a/src/extern/getopt.c b/src/extern/getopt.c
index 118fd11d..c0bf371b 100644
--- a/src/extern/getopt.c
+++ b/src/extern/getopt.c
@@ -31,7 +31,7 @@
 #include <string.h>
 #include "extern/getopt.h"
 
-int __optpos, __optreset;
+static int __optpos, __optreset;
 
 void musl__getopt_msg(const char *a, const char *b, const char *c, size_t l)
 {