diff --git a/src/plugins/clangcodemodel/clangdiagnostictooltipwidget.cpp b/src/plugins/clangcodemodel/clangdiagnostictooltipwidget.cpp
index 24b9506fc28..d7af5ab8ec7 100644
--- a/src/plugins/clangcodemodel/clangdiagnostictooltipwidget.cpp
+++ b/src/plugins/clangcodemodel/clangdiagnostictooltipwidget.cpp
@@ -289,7 +289,7 @@ private:
 
         const QString link = documentationUrlForOption(option);
         if (link.isEmpty())
-            return QString();
+            return option;
 
         return wrapInLink(option.toString(), link);
     }