diff --git a/appl/popper/pop_dropinfo.c b/appl/popper/pop_dropinfo.c
index 1d82f0de5..27117e11b 100644
--- a/appl/popper/pop_dropinfo.c
+++ b/appl/popper/pop_dropinfo.c
@@ -94,7 +94,7 @@ pop_dropinfo(POP *p)
 
 #ifdef DEBUG
     if(p->debug && msg_num > 0) {
-        register    i;
+        int i;
         for (i = 0, mp = p->mlp; i < p->msg_count; i++, mp++)
             pop_log(p,POP_DEBUG,
                 "Msg %d at offset %d is %d octets long and has %u lines.",
diff --git a/appl/telnet/libtelnet/auth.h b/appl/telnet/libtelnet/auth.h
index 615e8a07b..5c3a7ca76 100644
--- a/appl/telnet/libtelnet/auth.h
+++ b/appl/telnet/libtelnet/auth.h
@@ -83,5 +83,5 @@ typedef struct XauthP {
 
 #include "auth-proto.h"
 
-extern auth_debug_mode;
+extern int auth_debug_mode;
 #endif
diff --git a/appl/telnet/libtelnet/enc_des.c b/appl/telnet/libtelnet/enc_des.c
index 50f6f6815..52a9181df 100644
--- a/appl/telnet/libtelnet/enc_des.c
+++ b/appl/telnet/libtelnet/enc_des.c
@@ -48,7 +48,7 @@ RCSID("$Id$");
 
 #include <des.h>
 
-extern encrypt_debug_mode;
+extern int encrypt_debug_mode;
 
 #define	CFB	0
 #define	OFB	1
diff --git a/appl/telnet/libtelnet/kerberos.c b/appl/telnet/libtelnet/kerberos.c
index d8f07d48f..af7c8ebd8 100644
--- a/appl/telnet/libtelnet/kerberos.c
+++ b/appl/telnet/libtelnet/kerberos.c
@@ -77,7 +77,7 @@ RCSID("$Id$");
 #include "misc.h"
 
 int kerberos4_cksum P((unsigned char *, int));
-extern auth_debug_mode;
+extern int auth_debug_mode;
 
 static unsigned char str_data[1024] = { IAC, SB, TELOPT_AUTHENTICATION, 0,
 			  		AUTHTYPE_KERBEROS_V4, };
diff --git a/appl/telnet/telnet/utilities.c b/appl/telnet/telnet/utilities.c
index 3c98e3a89..bf195b6cf 100644
--- a/appl/telnet/telnet/utilities.c
+++ b/appl/telnet/telnet/utilities.c
@@ -131,7 +131,7 @@ Dump(char direction, unsigned char *buffer, int length)
 #   define min(x,y)	((x<y)? x:y)
     unsigned char *pThis;
     int offset;
-    extern pettydump;
+    extern int pettydump;
 
     offset = 0;
 
diff --git a/appl/telnet/telnetd/sys_term.c b/appl/telnet/telnetd/sys_term.c
index 49189dac4..19b569293 100644
--- a/appl/telnet/telnetd/sys_term.c
+++ b/appl/telnet/telnetd/sys_term.c
@@ -1766,7 +1766,7 @@ static
 void
 rmut(void)
 {
-	register f;
+	int f;
 	int found = 0;
 	struct utmp *u, *utmp;
 	int nutmp;