diff --git a/ui/text/text.h b/ui/text/text.h
index bb412a1..d275895 100644
--- a/ui/text/text.h
+++ b/ui/text/text.h
@@ -76,7 +76,7 @@ static constexpr TextSelection AllTextSelection = { 0, 0xFFFF };
 
 namespace Ui::Text {
 
-struct Block;
+class Block;
 class AbstractBlock;
 struct IsolatedEmoji;
 struct OnlyCustomEmoji;
diff --git a/ui/text/text_renderer.h b/ui/text/text_renderer.h
index 3d39c6f..600ce62 100644
--- a/ui/text/text_renderer.h
+++ b/ui/text/text_renderer.h
@@ -17,7 +17,7 @@ struct QScriptLine;
 
 namespace Ui::Text {
 
-struct AbstractBlock;
+class AbstractBlock;
 
 struct FixedRange {
 	QFixed from;