diff --git a/racket/src/cs/rumble/system.ss b/racket/src/cs/rumble/system.ss
index de9ecfd1e2..e614c62e19 100644
--- a/racket/src/cs/rumble/system.ss
+++ b/racket/src/cs/rumble/system.ss
@@ -51,6 +51,7 @@
             a6nt ta6nt
             a6le ta6le
             a6ob ta6ob
+            a6nb ta6nb
             a6fb ta6fb
             a6s2 ta6s2)
      'x86_64]
@@ -58,6 +59,7 @@
             i3nt ti3nt
             i3le ti3le
             i3ob ti3ob
+            i3nb ti3nb
             i3fb ti3fb
             i3s2 ti3s2
             i3qnx)
diff --git a/racket/src/rktio/configure b/racket/src/rktio/configure
index da6931ea1b..879f46c6b6 100755
--- a/racket/src/rktio/configure
+++ b/racket/src/rktio/configure
@@ -4227,6 +4227,8 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
    #include <locale.h>
    int main() {
       locale_t l = newlocale(LC_COLLATE_MASK | LC_CTYPE_MASK, "C", NULL);
+      locale_t old_l = uselocale(l);
+      uselocale(old_l);
       freelocale(l);
       return 0;
    }
diff --git a/racket/src/rktio/configure.ac b/racket/src/rktio/configure.ac
index 830d7fbe1f..c479240c74 100644
--- a/racket/src/rktio/configure.ac
+++ b/racket/src/rktio/configure.ac
@@ -182,6 +182,8 @@ AC_LINK_IFELSE([AC_LANG_SOURCE([
    #include <locale.h>
    int main() {
       locale_t l = newlocale(LC_COLLATE_MASK | LC_CTYPE_MASK, "C", NULL);
+      locale_t old_l = uselocale(l);
+      uselocale(old_l);
       freelocale(l);
       return 0;
    }])],