diff --git a/lib/program.js b/lib/program.js
index 0b1e56f..eeb060b 100644
--- a/lib/program.js
+++ b/lib/program.js
@@ -195,7 +195,7 @@ Program.prototype.setupDump = function() {
     return data.replace(/[\0\x80\x1b-\x1f\x7f\x01-\x1a]/g, function(ch) {
       switch (ch) {
         case '\0':
-        case '\200':
+        case '\x80':
           ch = '@';
           break;
         case '\x1b':
@@ -1911,7 +1911,7 @@ Program.prototype.getCursorColor = function(callback) {
 //Program.prototype.pad =
 Program.prototype.nul = function() {
   //if (this.has('pad')) return this.put.pad();
-  return this._write('\200');
+  return this._write('\x80');
 };
 
 Program.prototype.bel =
diff --git a/lib/tput.js b/lib/tput.js
index 4e4c1f0..37f512f 100644
--- a/lib/tput.js
+++ b/lib/tput.js
@@ -366,7 +366,7 @@ Tput.prototype.parseTerminfo = function(data, file) {
   o = 0;
   for (; i < l; i += 2) {
     v = Tput.numbers[o++];
-    if (data[i + 1] === 0377 && data[i] === 0377) {
+    if (data[i + 1] === parseInt('0377', 8) && data[i] === parseInt('0377', 8)) {
       info.numbers[v] = -1;
     } else {
       info.numbers[v] = (data[i + 1] << 8) | data[i];
@@ -379,7 +379,7 @@ Tput.prototype.parseTerminfo = function(data, file) {
   o = 0;
   for (; i < l; i += 2) {
     v = Tput.strings[o++];
-    if (data[i + 1] === 0377 && data[i] === 0377) {
+    if (data[i + 1] === parseInt('0377', 8) && data[i] === parseInt('0377', 8)) {
       info.strings[v] = -1;
     } else {
       info.strings[v] = (data[i + 1] << 8) | data[i];
@@ -533,7 +533,7 @@ Tput.prototype.parseExtended = function(data) {
   var _numbers = [];
   l = i + h.numCount * 2;
   for (; i < l; i += 2) {
-    if (data[i + 1] === 0377 && data[i] === 0377) {
+    if (data[i + 1] === parseInt('0377', 8) && data[i] === parseInt('0377', 8)) {
       _numbers.push(-1);
     } else {
       _numbers.push((data[i + 1] << 8) | data[i]);
@@ -544,7 +544,7 @@ Tput.prototype.parseExtended = function(data) {
   var _strings = [];
   l = i + h.strCount * 2;
   for (; i < l; i += 2) {
-    if (data[i + 1] === 0377 && data[i] === 0377) {
+    if (data[i + 1] === parseInt('0377', 8) && data[i] === parseInt('0377', 8)) {
       _strings.push(-1);
     } else {
       _strings.push((data[i + 1] << 8) | data[i]);
@@ -884,7 +884,7 @@ Tput.prototype._compile = function(info, key, str) {
           ch = ':';
           break;
         case '0':
-          ch = '\200';
+          ch = '\x80';
           break;
         case 'a':
           ch = '\x07';
@@ -2098,10 +2098,10 @@ Tput.prototype.detectBrokenACS = function(info) {
       && process.env.TERMCAP
       && ~process.env.TERMCAP.indexOf('screen')
       && ~process.env.TERMCAP.indexOf('hhII00')) {
-    if (~info.strings.enter_alt_charset_mode.indexOf('\016')
-        || ~info.strings.enter_alt_charset_mode.indexOf('\017')
-        || ~info.strings.set_attributes.indexOf('\016')
-        || ~info.strings.set_attributes.indexOf('\017')) {
+    if (~info.strings.enter_alt_charset_mode.indexOf('\x0e')
+        || ~info.strings.enter_alt_charset_mode.indexOf('\x0f')
+        || ~info.strings.set_attributes.indexOf('\x0e')
+        || ~info.strings.set_attributes.indexOf('\x0f')) {
       return true;
     }
   }
@@ -2280,7 +2280,7 @@ function sprintf(src) {
         break;
       case 'c': // char
         param = isFinite(param)
-          ? String.fromCharCode(param || 0200)
+          ? String.fromCharCode(param || parseInt('0200', 8))
           : '';
         break;
     }