1 files changed, 1 insertions, 1 deletions
diff --git a/perl.h b/perl.h
index c241ae64be..68750fe426 100644
--- a/perl.h
+++ b/perl.h
@@ -4010,7 +4010,7 @@ typedef Sighandler_t Sigsave_t;
 #endif
 
 #ifdef USE_PERLIO
-EXTERN_C void PerlIO_teardown();
+EXTERN_C void PerlIO_teardown(void);
 # ifdef USE_ITHREADS
 #  define PERLIO_INIT MUTEX_INIT(&PL_perlio_mutex)
 #  define PERLIO_TERM 				\