1 files changed, 5 insertions, 0 deletions
diff --git a/perlio.c b/perlio.c
index c3b331d70c..faa3b19369 100644
--- a/perlio.c
+++ b/perlio.c
@@ -50,6 +50,11 @@
 
 #include "XSUB.h"
 
+#ifdef __Lynx__
+/* Missing proto on LynxOS */
+int mkstemp(char*);
+#endif
+
 /* Call the callback or PerlIOBase, and return failure. */
 #define Perl_PerlIO_or_Base(f, callback, base, failure, args) 	\
 	if (PerlIOValid(f)) {					\