diff --git a/packages/flutter_markdown/lib/src/markdown_style_raw.dart b/packages/flutter_markdown/lib/src/markdown_style_raw.dart
index 4b694855bd..2bcac36083 100644
--- a/packages/flutter_markdown/lib/src/markdown_style_raw.dart
+++ b/packages/flutter_markdown/lib/src/markdown_style_raw.dart
@@ -100,7 +100,7 @@ class MarkdownStyleRaw {
   Map<String, TextStyle> get styles => _styles;
 
   void _init() {
-    _styles = {
+    _styles = <String, TextStyle>{
       'a': a,
       'p': p,
       'li': p,