From 974298bcced63bc77bc3f098a2fa1d1006cea1a9 Mon Sep 17 00:00:00 2001
From: Matthew Dean <matthew-dean@users.noreply.github.com>
Date: Thu, 16 Jul 2020 11:25:31 -0700
Subject: [PATCH] Fixes #3446

---
 packages/less/Gruntfile.js | 1 +
 packages/less/bin/lessc    | 4 ++++
 2 files changed, 5 insertions(+)

diff --git a/packages/less/Gruntfile.js b/packages/less/Gruntfile.js
index 8d30d93a7..bf967b102 100644
--- a/packages/less/Gruntfile.js
+++ b/packages/less/Gruntfile.js
@@ -251,6 +251,7 @@ module.exports = function(grunt) {
                 command: [
                     // @TODO: make this more thorough
                     // CURRENT OPTIONS
+                    `node bin/lessc --ie-compat ${lessFolder}/_main/lazy-eval.less tmp/lazy-eval.css`,
                     // --math
                     `node bin/lessc --math=always ${lessFolder}/_main/lazy-eval.less tmp/lazy-eval.css`,
                     `node bin/lessc --math=parens-division ${lessFolder}/_main/lazy-eval.less tmp/lazy-eval.css`,
diff --git a/packages/less/bin/lessc b/packages/less/bin/lessc
index 82420826b..18599a728 100755
--- a/packages/less/bin/lessc
+++ b/packages/less/bin/lessc
@@ -516,6 +516,10 @@ function processPluginQueue() {
         }
 
         break;
+      
+      case 'ie-compat':
+        console.warn('The --ie-compat option is deprecated, as it has no effect on compilation.');
+        break;
 
       case 'relative-urls':
         console.warn('The --relative-urls option has been deprecated. Use --rewrite-urls=all.');