diff --git a/src/plugins/cpptools/cpplocatordata.h b/src/plugins/cpptools/cpplocatordata.h
index d133bc9cc69..2a835b46df3 100644
--- a/src/plugins/cpptools/cpplocatordata.h
+++ b/src/plugins/cpptools/cpplocatordata.h
@@ -36,10 +36,6 @@
 
 namespace CppTools {
 
-namespace Internal {
-class CppToolsPlugin;
-} // namespace Internal
-
 class CppLocatorData : public QObject
 {
     Q_OBJECT