diff --git a/src/plugins/qmldesigner/designercore/include/annotation.h b/src/plugins/qmldesigner/designercore/include/annotation.h
index e00481d57ab..752c817211a 100644
--- a/src/plugins/qmldesigner/designercore/include/annotation.h
+++ b/src/plugins/qmldesigner/designercore/include/annotation.h
@@ -94,7 +94,7 @@ public:
     static bool sameContent(const Comment &a, const Comment &b);
     bool operator==(const Comment &comment) const; //everything is similar.
 
-    bool isEmpty();
+    bool isEmpty() const;
 
     QString toQString() const;
 
diff --git a/src/plugins/qmldesigner/designercore/model/annotation.cpp b/src/plugins/qmldesigner/designercore/model/annotation.cpp
index e27cac283c2..f8f2edc0d8a 100644
--- a/src/plugins/qmldesigner/designercore/model/annotation.cpp
+++ b/src/plugins/qmldesigner/designercore/model/annotation.cpp
@@ -133,7 +133,7 @@ bool Comment::operator==(const Comment &comment) const
     return (sameContent(comment) && (m_timestamp == comment.timestamp()));
 }
 
-bool Comment::isEmpty()
+bool Comment::isEmpty() const
 {
     return sameContent(Comment());
 }