diff --git a/lib/source-map-consumer.js b/lib/source-map-consumer.js
index 17ef92b1..f33248a5 100644
--- a/lib/source-map-consumer.js
+++ b/lib/source-map-consumer.js
@@ -192,6 +192,8 @@ class BasicSourceMapConsumer extends SourceMapConsumer {
         "x_google_ignoreList",
         null
       );
+      // Support the renamed `ignoreList` field (spec rename of x_google_ignoreList).
+      const ignoreList = util.getArg(sourceMap, "ignoreList", null);
 
       // Once again, Sass deviates from the spec and supplies the version as a
       // string rather than a number, so we use loose equality checking here.
@@ -220,7 +222,8 @@ class BasicSourceMapConsumer extends SourceMapConsumer {
       that._mappings = mappings;
       that._sourceMapURL = aSourceMapURL;
       that.file = file;
-      that.x_google_ignoreList = x_google_ignoreList;
+      that.x_google_ignoreList = x_google_ignoreList || ignoreList;
+      that.ignoreList = that.x_google_ignoreList;
 
       that._computedColumnSpans = false;
       that._wasmMappings = null;
@@ -283,7 +286,7 @@ class BasicSourceMapConsumer extends SourceMapConsumer {
    * @returns BasicSourceMapConsumer
    */
   static fromSourceMap(aSourceMap, aSourceMapURL) {
-    return new BasicSourceMapConsumer(aSourceMap.toString());
+    return new BasicSourceMapConsumer(aSourceMap.toString(), aSourceMapURL);
   }
 
   get sources() {
diff --git a/source-map.d.ts b/source-map.d.ts
index 45646052..119962f6 100644
--- a/source-map.d.ts
+++ b/source-map.d.ts
@@ -381,7 +381,7 @@ export class SourceMapGenerator {
 }
 
 export class SourceNode {
-  children: SourceNode[];
+  children: (SourceNode | string)[];
   sourceContents: any;
   line: number;
   column: number;