diff --git a/src/plugins/clangcodemodel/clangcompletionchunkstotextconverter.cpp b/src/plugins/clangcodemodel/clangcompletionchunkstotextconverter.cpp
index 4954979e38c..796fe87c1c8 100644
--- a/src/plugins/clangcodemodel/clangcompletionchunkstotextconverter.cpp
+++ b/src/plugins/clangcodemodel/clangcompletionchunkstotextconverter.cpp
@@ -296,7 +296,7 @@ void CompletionChunksToTextConverter::addExtraVerticalSpaceBetweenBraces(
     }
 }
 
-QString CompletionChunksToTextConverter::inDesiredTextFormat(const Utf8String &text)
+QString CompletionChunksToTextConverter::inDesiredTextFormat(const Utf8String &text) const
 {
     if (m_textFormat == TextFormat::Html)
         return text.toString().toHtmlEscaped();