1 files changed, 4 insertions, 0 deletions
diff --git a/main.c b/main.c
index 691cfcdd5b..d1f275aa99 100644
--- a/main.c
+++ b/main.c
@@ -12,7 +12,9 @@
 
 #undef RUBY_EXPORT
 #include "ruby/ruby.h"
+#ifdef LOCALE_H
 #include <locale.h>
+#endif
 
 RUBY_GLOBAL_SETUP
 
@@ -23,7 +25,9 @@ main(int argc, char **argv, char **envp)
     extern void ruby_set_debug_option(const char *);
     ruby_set_debug_option(getenv("RUBY_DEBUG"));
 #endif
+#ifdef LOCALE_H
     setlocale(LC_CTYPE, "");
+#endif
 
     ruby_sysinit(&argc, &argv);
     {