1 files changed, 4 insertions, 0 deletions
diff --git a/perlio.c b/perlio.c
index 505548ae39..9230b0c004 100644
--- a/perlio.c
+++ b/perlio.c
@@ -7,6 +7,8 @@
  *
  */
 
+#if !defined(PERL_IMPLICIT_SYS)
+
 #define VOIDUSED 1
 #include "config.h"
 
@@ -560,3 +562,5 @@ PerlIO_sprintf(char *s, int n, const char *fmt,...)
 }
 #endif
 
+#endif /* !PERL_IMPLICIT_SYS */
+