diff --git a/src/gui/kernel/qkeymapper.cpp b/src/gui/kernel/qkeymapper.cpp
index 98fadb988b8..ff781ec43ba 100644
--- a/src/gui/kernel/qkeymapper.cpp
+++ b/src/gui/kernel/qkeymapper.cpp
@@ -34,7 +34,7 @@ QKeyMapper::~QKeyMapper()
 {
 }
 
-QList<int> QKeyMapper::possibleKeys(QKeyEvent *e)
+QList<int> QKeyMapper::possibleKeys(const QKeyEvent *e)
 {
     QList<int> result = QGuiApplicationPrivate::platformIntegration()->possibleKeys(e);
     if (!result.isEmpty())
diff --git a/src/gui/kernel/qkeymapper_p.h b/src/gui/kernel/qkeymapper_p.h
index 71cb5da2ea8..5c6f89ab82e 100644
--- a/src/gui/kernel/qkeymapper_p.h
+++ b/src/gui/kernel/qkeymapper_p.h
@@ -33,7 +33,7 @@ public:
     ~QKeyMapper();
 
     static QKeyMapper *instance();
-    static QList<int> possibleKeys(QKeyEvent *e);
+    static QList<int> possibleKeys(const QKeyEvent *e);
 
     QT_DECLARE_NATIVE_INTERFACE_ACCESSOR(QKeyMapper)