diff --git a/src/libc.c b/src/libc.c
index b3f90cede..adef2ef84 100644
--- a/src/libc.c
+++ b/src/libc.c
@@ -182,8 +182,10 @@ int C_RLIMIT_NTHR() {
 #endif
 }
 
-#ifdef LC_GLOBAL_LOCALE
 locale_t C_LC_GLOBAL_LOCALE() {
+    // LC_GLOBAL_LOCALE is usually -1, but not always (e.g. under NetBSD).
+#ifdef LC_GLOBAL_LOCALE
     return LC_GLOBAL_LOCALE;
-}
 #endif
+    return (locale_t)-1;
+}
diff --git a/src/locale.rs b/src/locale.rs
index 1beff696a..0f69fa589 100644
--- a/src/locale.rs
+++ b/src/locale.rs
@@ -65,11 +65,7 @@ unsafe fn read_locale() -> Option<Locale> {
     extern "C" {
         fn localeconv_l(loc: libc::locale_t) -> *const libc::lconv;
     }
-    /// Rust libc does not provide LC_GLOBAL_LOCALE, but it is usually -1.
     #[cfg(not(target_os = "netbsd"))]
-    const LC_GLOBAL_LOCALE: libc::locale_t = (-1_isize) as libc::locale_t;
-    // On NetBSD it's not.
-    #[cfg(target_os = "netbsd")]
     let LC_GLOBAL_LOCALE: libc::locale_t = unsafe { crate::libc::C_LC_GLOBAL_LOCALE() };
 
     const empty: [libc::c_char; 1] = [0];