diff -urN tftp-hpa-5.2.orig/tftp/main.c tftp-hpa-5.2/tftp/main.c
--- tftp-hpa-5.2.orig/tftp/main.c	2020-11-14 22:21:15.851650899 -0700
+++ tftp-hpa-5.2/tftp/main.c	2020-11-14 22:21:41.878327755 -0700
@@ -95,7 +95,7 @@
 int margc;
 char *margv[20];
 const char *prompt = "tftp> ";
-sigjmp_buf toplevel;
+static sigjmp_buf toplevel;
 void intr(int);
 struct servent *sp;
 int portrange = 0;
diff -urN tftp-hpa-5.2.orig/tftp/tftp.c tftp-hpa-5.2/tftp/tftp.c
--- tftp-hpa-5.2.orig/tftp/tftp.c	2020-11-14 22:21:15.851650899 -0700
+++ tftp-hpa-5.2/tftp/tftp.c	2020-11-14 22:21:51.304998113 -0700
@@ -48,7 +48,7 @@
 #define PKTSIZE    SEGSIZE+4
 char ackbuf[PKTSIZE];
 int timeout;
-sigjmp_buf toplevel;
+static sigjmp_buf toplevel;
 sigjmp_buf timeoutbuf;
 
 static void nak(int, const char *);