diff --git a/usr.bin/hexdump/display.c b/usr.bin/hexdump/display.c
index 1b281961e25d..a09a5715e4f6 100644
--- a/usr.bin/hexdump/display.c
+++ b/usr.bin/hexdump/display.c
@@ -356,7 +356,7 @@ doskip(fname, statok)
 		}
 	}
 	if (S_ISREG(sb.st_mode)) {
-		if (fseek(stdin, skip, SEEK_SET))
+		if (fseeko(stdin, skip, SEEK_SET))
 			err(1, "%s", fname);
 		address += skip;
 		skip = 0;
diff --git a/usr.bin/hexdump/hexsyntax.c b/usr.bin/hexdump/hexsyntax.c
index f3bf5878dafe..72ec69f338ef 100644
--- a/usr.bin/hexdump/hexsyntax.c
+++ b/usr.bin/hexdump/hexsyntax.c
@@ -104,7 +104,7 @@ newsyntax(argc, argvp)
 			add("\"%07.7_ax \" 8/2 \" %06o \" \"\\n\"");
 			break;
 		case 's':
-			if ((skip = strtol(optarg, &p, 0)) < 0)
+			if ((skip = strtoll(optarg, &p, 0)) < 0)
 				errx(1, "%s: bad skip value", optarg);
 			switch(*p) {
 			case 'b':
diff --git a/usr.bin/hexdump/odsyntax.c b/usr.bin/hexdump/odsyntax.c
index 65a160e64453..8823a9cf34f5 100644
--- a/usr.bin/hexdump/odsyntax.c
+++ b/usr.bin/hexdump/odsyntax.c
@@ -214,7 +214,7 @@ odoffset(argc, argvp)
 		base = 10;
 	}
 
-	skip = strtol(num, (char **)&end, base ? base : 8);
+	skip = strtoll(num, (char **)&end, base ? base : 8);
 
 	/* if end isn't the same as p, we got a non-octal digit */
 	if (end != p) {