diff --git a/tests/unit/mockup/texteditor/semantichighlighter.h b/tests/unit/mockup/texteditor/semantichighlighter.h
index ab4f9fa378a..323a48347c5 100644
--- a/tests/unit/mockup/texteditor/semantichighlighter.h
+++ b/tests/unit/mockup/texteditor/semantichighlighter.h
@@ -34,10 +34,8 @@ public:
     unsigned line;
     unsigned column;
     unsigned length;
-    union {
-        TextStyles textStyles;
-        int kind;
-    };
+    TextStyles textStyles;
+    int kind;
     bool useTextSyles;
 
     bool isValid() const