diff --git a/src/vs/workbench/api/node/extHostTunnelService.ts b/src/vs/workbench/api/node/extHostTunnelService.ts
index ef2679b4f9d741ecbb43d71564099bda7fdbb296..a5932990726610b9d7c63032e461418f3c2baf66 100644
--- a/src/vs/workbench/api/node/extHostTunnelService.ts
+++ b/src/vs/workbench/api/node/extHostTunnelService.ts
@@ -190,10 +190,19 @@ export class ExtHostTunnelService extends Disposable implements IExtHostTunnelSe
 
 	private parseIpAddress(hex: string): string {
 		let result = '';
-		for (let i = hex.length - 2; (i >= 0); i -= 2) {
-			result += parseInt(hex.substr(i, 2), 16);
-			if (i !== 0) {
-				result += '.';
+		if (hex.length === 8) {
+			for (let i = hex.length - 2; i >= 0; i -= 2) {
+				result += parseInt(hex.substr(i, 2), 16);
+				if (i !== 0) {
+					result += '.';
+				}
+			}
+		} else {
+			for (let i = hex.length - 4; i >= 0; i -= 4) {
+				result += parseInt(hex.substr(i, 4), 16).toString(16);
+				if (i !== 0) {
+					result += ':';
+				}
 			}
 		}
 		return result;