diff --git a/src/browser/CoreBrowserTerminal.ts b/src/browser/CoreBrowserTerminal.ts
index 869a545a..57208160 100644
--- a/src/browser/CoreBrowserTerminal.ts
+++ b/src/browser/CoreBrowserTerminal.ts
@@ -48,7 +48,7 @@ import * as Browser from 'common/Platform';
 import { ColorRequestType, CoreMouseAction, CoreMouseButton, CoreMouseEventType, IColorEvent, ITerminalOptions, KeyboardResultType, SpecialColorIndex } from 'common/Types';
 import { DEFAULT_ATTR_DATA } from 'common/buffer/BufferLine';
 import { IBuffer } from 'common/buffer/Types';
-import { C0, C1_ESCAPED } from 'common/data/EscapeSequences';
+import { C0, C1ESCAPED } from 'common/data/EscapeSequences';
 import { toRgbString } from 'common/input/XParseColor';
 import { DecorationService } from 'common/services/DecorationService';
 import { IDecorationService } from 'common/services/Services';
@@ -235,7 +235,7 @@ export class CoreBrowserTerminal extends CoreTerminal implements ITerminal {
           const colorRgb = color.toColorRGB(acc === 'ansi'
             ? this._themeService.colors.ansi[req.index]
             : this._themeService.colors[acc]);
-          this.coreService.triggerDataEvent(`${C0.ESC}]${ident};${toRgbString(colorRgb)}${C1_ESCAPED.ST}`);
+          this.coreService.triggerDataEvent(`${C0.ESC}]${ident};${toRgbString(colorRgb)}${C1ESCAPED.ST}`);
           break;
         case ColorRequestType.SET:
           if (acc === 'ansi') {
diff --git a/src/common/data/EscapeSequences.ts b/src/common/data/EscapeSequences.ts
index 0e034620..fe6cf329 100644
--- a/src/common/data/EscapeSequences.ts
+++ b/src/common/data/EscapeSequences.ts
@@ -7,147 +7,148 @@
  * C0 control codes
  * See = https://en.wikipedia.org/wiki/C0_and_C1_control_codes
  */
-export namespace C0 {
+export const enum C0 {
   /** Null (Caret = ^@, C = \0) */
-  export const NUL = '\x00';
+  NUL = '\x00',
   /** Start of Heading (Caret = ^A) */
-  export const SOH = '\x01';
+  SOH = '\x01',
   /** Start of Text (Caret = ^B) */
-  export const STX = '\x02';
+  STX = '\x02',
   /** End of Text (Caret = ^C) */
-  export const ETX = '\x03';
+  ETX = '\x03',
   /** End of Transmission (Caret = ^D) */
-  export const EOT = '\x04';
+  EOT = '\x04',
   /** Enquiry (Caret = ^E) */
-  export const ENQ = '\x05';
+  ENQ = '\x05',
   /** Acknowledge (Caret = ^F) */
-  export const ACK = '\x06';
+  ACK = '\x06',
   /** Bell (Caret = ^G, C = \a) */
-  export const BEL = '\x07';
+  BEL = '\x07',
   /** Backspace (Caret = ^H, C = \b) */
-  export const BS  = '\x08';
+  BS = '\x08',
   /** Character Tabulation, Horizontal Tabulation (Caret = ^I, C = \t) */
-  export const HT  = '\x09';
+  HT = '\x09',
   /** Line Feed (Caret = ^J, C = \n) */
-  export const LF  = '\x0a';
+  LF = '\x0a',
   /** Line Tabulation, Vertical Tabulation (Caret = ^K, C = \v) */
-  export const VT  = '\x0b';
+  VT = '\x0b',
   /** Form Feed (Caret = ^L, C = \f) */
-  export const FF  = '\x0c';
+  FF = '\x0c',
   /** Carriage Return (Caret = ^M, C = \r) */
-  export const CR  = '\x0d';
+  CR = '\x0d',
   /** Shift Out (Caret = ^N) */
-  export const SO  = '\x0e';
+  SO = '\x0e',
   /** Shift In (Caret = ^O) */
-  export const SI  = '\x0f';
+  SI = '\x0f',
   /** Data Link Escape (Caret = ^P) */
-  export const DLE = '\x10';
+  DLE = '\x10',
   /** Device Control One (XON) (Caret = ^Q) */
-  export const DC1 = '\x11';
+  DC1 = '\x11',
   /** Device Control Two (Caret = ^R) */
-  export const DC2 = '\x12';
+  DC2 = '\x12',
   /** Device Control Three (XOFF) (Caret = ^S) */
-  export const DC3 = '\x13';
+  DC3 = '\x13',
   /** Device Control Four (Caret = ^T) */
-  export const DC4 = '\x14';
+  DC4 = '\x14',
   /** Negative Acknowledge (Caret = ^U) */
-  export const NAK = '\x15';
+  NAK = '\x15',
   /** Synchronous Idle (Caret = ^V) */
-  export const SYN = '\x16';
+  SYN = '\x16',
   /** End of Transmission Block (Caret = ^W) */
-  export const ETB = '\x17';
+  ETB = '\x17',
   /** Cancel (Caret = ^X) */
-  export const CAN = '\x18';
+  CAN = '\x18',
   /** End of Medium (Caret = ^Y) */
-  export const EM  = '\x19';
+  EM = '\x19',
   /** Substitute (Caret = ^Z) */
-  export const SUB = '\x1a';
+  SUB = '\x1a',
   /** Escape (Caret = ^[, C = \e) */
-  export const ESC = '\x1b';
+  ESC = '\x1b',
   /** File Separator (Caret = ^\) */
-  export const FS  = '\x1c';
+  FS = '\x1c',
   /** Group Separator (Caret = ^]) */
-  export const GS  = '\x1d';
+  GS = '\x1d',
   /** Record Separator (Caret = ^^) */
-  export const RS  = '\x1e';
+  RS = '\x1e',
   /** Unit Separator (Caret = ^_) */
-  export const US  = '\x1f';
+  US = '\x1f',
   /** Space */
-  export const SP  = '\x20';
+  SP = '\x20',
   /** Delete (Caret = ^?) */
-  export const DEL = '\x7f';
+  DEL = '\x7f'
 }
 
 /**
  * C1 control codes
  * See = https://en.wikipedia.org/wiki/C0_and_C1_control_codes
  */
-export namespace C1 {
+export const enum C1 {
   /** padding character */
-  export const PAD = '\x80';
+  PAD = '\x80',
   /** High Octet Preset */
-  export const HOP = '\x81';
+  HOP = '\x81',
   /** Break Permitted Here */
-  export const BPH = '\x82';
+  BPH = '\x82',
   /** No Break Here */
-  export const NBH = '\x83';
+  NBH = '\x83',
   /** Index */
-  export const IND = '\x84';
+  IND = '\x84',
   /** Next Line */
-  export const NEL = '\x85';
+  NEL = '\x85',
   /** Start of Selected Area */
-  export const SSA = '\x86';
+  SSA = '\x86',
   /** End of Selected Area */
-  export const ESA = '\x87';
+  ESA = '\x87',
   /** Horizontal Tabulation Set */
-  export const HTS = '\x88';
+  HTS = '\x88',
   /** Horizontal Tabulation With Justification */
-  export const HTJ = '\x89';
+  HTJ = '\x89',
   /** Vertical Tabulation Set */
-  export const VTS = '\x8a';
+  VTS = '\x8a',
   /** Partial Line Down */
-  export const PLD = '\x8b';
+  PLD = '\x8b',
   /** Partial Line Up */
-  export const PLU = '\x8c';
+  PLU = '\x8c',
   /** Reverse Index */
-  export const RI = '\x8d';
+  RI = '\x8d',
   /** Single-Shift 2 */
-  export const SS2 = '\x8e';
+  SS2 = '\x8e',
   /** Single-Shift 3 */
-  export const SS3 = '\x8f';
+  SS3 = '\x8f',
   /** Device Control String */
-  export const DCS = '\x90';
+  DCS = '\x90',
   /** Private Use 1 */
-  export const PU1 = '\x91';
+  PU1 = '\x91',
   /** Private Use 2 */
-  export const PU2 = '\x92';
+  PU2 = '\x92',
   /** Set Transmit State */
-  export const STS = '\x93';
+  STS = '\x93',
   /** Destructive backspace, intended to eliminate ambiguity about meaning of BS. */
-  export const CCH = '\x94';
+  CCH = '\x94',
   /** Message Waiting */
-  export const MW = '\x95';
+  MW = '\x95',
   /** Start of Protected Area */
-  export const SPA = '\x96';
+  SPA = '\x96',
   /** End of Protected Area */
-  export const EPA = '\x97';
+  EPA = '\x97',
   /** Start of String */
-  export const SOS = '\x98';
+  SOS = '\x98',
   /** Single Graphic Character Introducer */
-  export const SGCI = '\x99';
+  SGCI = '\x99',
   /** Single Character Introducer */
-  export const SCI = '\x9a';
+  SCI = '\x9a',
   /** Control Sequence Introducer */
-  export const CSI = '\x9b';
+  CSI = '\x9b',
   /** String Terminator */
-  export const ST = '\x9c';
+  ST = '\x9c',
   /** Operating System Command */
-  export const OSC = '\x9d';
+  OSC = '\x9d',
   /** Privacy Message */
-  export const PM = '\x9e';
+  PM = '\x9e',
   /** Application Program Command */
-  export const APC = '\x9f';
+  APC = '\x9f'
 }
-export namespace C1_ESCAPED {
-  export const ST = `${C0.ESC}\\`;
+
+export const enum C1ESCAPED {
+  ST = '\x1b\\'
 }