diff --git a/src/plugins/coreplugin/id.cpp b/src/plugins/coreplugin/id.cpp
index b269877cf37..7a0e742b7de 100644
--- a/src/plugins/coreplugin/id.cpp
+++ b/src/plugins/coreplugin/id.cpp
@@ -283,6 +283,12 @@ Id Id::withSuffix(const char *suffix) const
     return Id(ba.constData());
 }
 
+Id Id::withSuffix(const QString &suffix) const
+{
+    const QByteArray ba = name() + suffix.toUtf8();
+    return Id(ba.constData());
+}
+
 /*!
   Constructs a derived id.
 
diff --git a/src/plugins/coreplugin/id.h b/src/plugins/coreplugin/id.h
index 00f67b6012f..1f8ae83bc71 100644
--- a/src/plugins/coreplugin/id.h
+++ b/src/plugins/coreplugin/id.h
@@ -50,8 +50,9 @@ public:
     explicit Id(const QByteArray &name);
 
     Id withSuffix(int suffix) const;
-    Id withSuffix(const char *name) const;
-    Id withPrefix(const char *name) const;
+    Id withSuffix(const char *suffix) const;
+    Id withSuffix(const QString &suffix) const;
+    Id withPrefix(const char *prefix) const;
 
     QByteArray name() const;
     QString toString() const; // Avoid.