diff --git a/CHANGELOG.md b/CHANGELOG.md
index 74ecdb529..0fe79b900 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+## 1.43.2
+
+* Improve the error message when the default namespace of a `@use` rule is not
+  a valid identifier.
+
 ## 1.43.1
 
 * No user-visible changes.
diff --git a/lib/src/parse/stylesheet.dart b/lib/src/parse/stylesheet.dart
index afe741594..5685f151c 100644
--- a/lib/src/parse/stylesheet.dart
+++ b/lib/src/parse/stylesheet.dart
@@ -1398,7 +1398,11 @@ abstract class StylesheetParser extends Parser {
     try {
       return Parser.parseIdentifier(namespace, logger: logger);
     } on SassFormatException {
-      error('Invalid Sass identifier "$namespace"', scanner.spanFrom(start));
+      error(
+          'The default namespace "$namespace" is not a valid Sass identifier.\n'
+          "\n"
+          'Recommendation: add an "as" clause to define an explicit namespace.',
+          scanner.spanFrom(start));
     }
   }
 
diff --git a/pubspec.yaml b/pubspec.yaml
index 7268857ca..f2dff30f8 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: sass
-version: 1.43.1
+version: 1.43.2-dev
 description: A Sass implementation in Dart.
 homepage: https://github.com/sass/dart-sass