--- screen-5.0.1/window.c
+++ screen-5.0.1/window.c
@@ -61,7 +61,7 @@ static void WinRedisplayLine(int, int, i
 static void WinClearLine(int, int, int, int);
 static int WinResize(int, int);
 static void WinRestore(void);
-static int DoAutolf(char *, size_t *, int);
+static int DoAutolf(char *, int *, int);
 static void ZombieProcess(char **, size_t *);
 static void win_readev_fn(Event *, void *);
 static void win_writeev_fn(Event *, void *);
@@ -74,9 +74,9 @@ static void win_silenceev_fn(Event *, vo
 static void win_destroyev_fn(Event *, void *);
 
 static int ForkWindow(Window *, char **, char *);
-static void zmodem_found(Window *, int, char *, size_t);
+static void zmodem_found(Window *, int, char *, int);
 static void zmodemFin(char *, size_t, void *);
-static int zmodem_parse(Window *, char *, size_t);
+static int zmodem_parse(Window *, char *, int);
 
 bool VerboseCreate = false;		/* XXX move this to user.h */
 
@@ -191,10 +191,10 @@ WinRestore,
 	NULL
 };
 
-static int DoAutolf(char *buf, size_t *lenp, int fr)
+static int DoAutolf(char *buf, int *lenp, int fr)
 {
 	char *p;
-	size_t len = *lenp;
+	int len = *lenp;
 	int trunc = 0;
 
 	for (p = buf; len > 0; p++, len--) {
@@ -215,7 +215,7 @@ }
 
 static void WinProcess(char **bufpp, size_t *lenp)
 {
-	size_t l2 = 0, f, *ilen, l = *lenp, trunc;
+	int l2 = 0, f, *ilen, l = *lenp, trunc;
 	char *ibuf;
 
 	fore = (Window *)flayer->l_data;
@@ -291,7 +291,7 @@ }
 
 static void ZombieProcess(char **bufpp, size_t *lenp)
 {
-	size_t l = *lenp;
+	int l = *lenp;
 	char *buf = *bufpp, b1[10], b2[10];
 
 	fore = (Window *)flayer->l_data;
@@ -699,7 +699,7 @@ p->w_writeev.type = EV_WRITE;
 	p->w_readev.data = p->w_writeev.data = (char *)p;
 	p->w_readev.handler = win_readev_fn;
 	p->w_writeev.handler = win_writeev_fn;
-	p->w_writeev.condpos = (int *)&p->w_inlen;
+	p->w_writeev.condpos = &p->w_inlen;
 	evenq(&p->w_readev);
 	evenq(&p->w_writeev);
 	p->w_paster.pa_slowev.type = EV_TIMEOUT;
@@ -1344,7 +1344,7 @@ pwin->p_writeev.type = EV_WRITE;
 	pwin->p_readev.data = pwin->p_writeev.data = (char *)w;
 	pwin->p_readev.handler = pseu_readev_fn;
 	pwin->p_writeev.handler = pseu_writeev_fn;
-	pwin->p_writeev.condpos = (int *)&pwin->p_inlen;
+	pwin->p_writeev.condpos = &pwin->p_inlen;
 	if (pwin->p_fdpat & (F_PFRONT << F_PSHIFT * 2 | F_PFRONT << F_PSHIFT))
 		evenq(&pwin->p_readev);
 	evenq(&pwin->p_writeev);
@@ -1378,7 +1378,7 @@ close(pwin->p_ptyfd);
 	}
 	evdeq(&pwin->p_readev);
 	evdeq(&pwin->p_writeev);
-	if (w->w_readev.condneg == (int *)&pwin->p_inlen)
+	if (w->w_readev.condneg == &pwin->p_inlen)
 		w->w_readev.condpos = w->w_readev.condneg = NULL;
 	evenq(&w->w_readev);
 	free((char *)pwin);
@@ -1484,7 +1484,7 @@ if (wtop) {
 		size = IOSIZE - p->w_pwin->p_inlen;
 		if (size <= 0) {
 			event->condpos = &const_IOSIZE;
-			event->condneg = (int *)&p->w_pwin->p_inlen;
+			event->condneg = &p->w_pwin->p_inlen;
 			return;
 		}
 	}
@@ -1567,7 +1567,7 @@ }
 static void win_writeev_fn(Event *event, void *data)
 {
 	Window *p = (Window *)data;
-	size_t len;
+	int len;
 	if (p->w_inlen) {
 		if ((len = write(event->fd, p->w_inbuf, p->w_inlen)) <= 0)
 			len = p->w_inlen;	/* dead window */
@@ -1604,7 +1604,7 @@ if (ptow) {
 		size = IOSIZE - p->w_inlen;
 		if (size <= 0) {
 			event->condpos = &const_IOSIZE;
-			event->condneg = (int *)&p->w_inlen;
+			event->condneg = &p->w_inlen;
 			return;
 		}
 	}
@@ -1647,7 +1647,7 @@ static void pseu_writeev_fn(Event *event
 {
 	Window *p = (Window *)data;
 	struct pseudowin *pw = p->w_pwin;
-	size_t len;
+	int len;
 
 	if (pw->p_inlen == 0)
 		return;
@@ -1687,10 +1687,10 @@ (void)data; /* unused */
 	WindowDied(p, p->w_exitstatus, 1);
 }
 
-static int zmodem_parse(Window *p, char *bp, size_t len)
+static int zmodem_parse(Window *p, char *bp, int len)
 {
 	char *b2 = bp;
-	for (size_t i = 0; i < len; i++, b2++) {
+	for (int i = 0; i < len; i++, b2++) {
 		if (p->w_zauto == 0) {
 			for (; i < len; i++, b2++)
 				if (*b2 == 030)
@@ -1760,7 +1760,7 @@ LayProcess(&s, &l);
 	}
 }
 
-static void zmodem_found(Window *p, int send, char *bp, size_t len)
+static void zmodem_found(Window *p, int send, char *bp, int len)
 {
 	char *s;
 	size_t n;
@@ -1796,7 +1796,7 @@ ZmodemPage();
 		display = d;
 		evdeq(&D_blockedev);
 		D_readev.condpos = &const_IOSIZE;
-		D_readev.condneg = (int *)&p->w_inlen;
+		D_readev.condneg = &p->w_inlen;
 		ClearAll();
 		GotoPos(0, 0);
 		SetRendition(&mchar_blank);
--- screen-5.0.1/window.h
+++ screen-5.0.1/window.h
@@ -79,7 +79,7 @@ Event	p_writeev;
 	char	p_cmd[MAXSTR];
 	char	p_tty[MAXSTR];
 	char	p_inbuf[IOSIZE];	/* buffered writing to p_ptyfd */
-	size_t	p_inlen;
+	int	p_inlen;
 };
 
 /* bits for fdpat: */
@@ -157,9 +157,9 @@ Event w_zombieev;		/* event to try to re
 	int	 w_poll_zombie_timeout;
 	int	 w_ptyfd;		/* fd of the master pty */
 	char	 w_inbuf[IOSIZE];
-	size_t	 w_inlen;
+	int	 w_inlen;
 	char	 w_outbuf[IOSIZE];
-	size_t	 w_outlen;
+	int	 w_outlen;
 	bool	 w_aflag;		/* (-a option) */
 	bool	 w_dynamicaka;		/* should we change name */
 	char	*w_title;		/* name of the window */
diff -up screen-5.0.1/telnet.c.orig screen-5.0.1/telnet.c
--- screen-5.0.1/telnet.c.orig	2025-12-02 13:44:43.155101460 +0000
+++ screen-5.0.1/telnet.c	2025-12-02 13:45:01.337511436 +0000
@@ -228,7 +228,7 @@ void TelProcessLine(char **bufpp, size_t
 	*lenp = 0;
 }
 
-int DoTelnet(char *buf, size_t *lenp, int f)
+int DoTelnet(char *buf, int *lenp, int f)
 {
 	int echo = !fore->w_telropts[TO_ECHO];
 	int cmode = fore->w_telropts[TO_SGA];
diff -up screen-5.0.1/telnet.h.orig screen-5.0.1/telnet.h
--- screen-5.0.1/telnet.h.orig	2025-12-02 13:44:38.734028264 +0000
+++ screen-5.0.1/telnet.h	2025-12-02 13:45:09.819672478 +0000
@@ -9,7 +9,7 @@
 int TelOpenAndConnect(Window *);
 int TelIsline(Window *);
 void TelProcessLine(char **, size_t *);
-int DoTelnet(char *, size_t *, int);
+int DoTelnet(char *, int *, int);
 int TelIn(Window *, char *, size_t, int);
 void TelBreak(Window *);
 void TelWindowSize(Window *);