diff --git a/gestures.cc b/gestures.cc
index 0d00fe10..12aec789 100644
--- a/gestures.cc
+++ b/gestures.cc
@@ -313,6 +313,9 @@ QGestureRecognizer::Result GDSwipeGestureRecognizer::recognize( QGesture * state
   return result;
 }
 
+const qreal GDPinchGestureRecognizer::OUT_SCALE_LIMIT = 0.5;
+const qreal GDPinchGestureRecognizer::IN_SCALE_LIMIT = 2;
+
 bool handleGestureEvent( QObject * obj, QEvent * event, GestureResult & result,
                          QPoint & point )
 {
diff --git a/gestures.hh b/gestures.hh
index 1d07c063..fa57fa23 100644
--- a/gestures.hh
+++ b/gestures.hh
@@ -83,8 +83,8 @@ protected:
 class GDPinchGestureRecognizer : public QGestureRecognizer
 {
 public:
-  static const qreal OUT_SCALE_LIMIT = 0.5;
-  static const qreal IN_SCALE_LIMIT = 2;
+  static const qreal OUT_SCALE_LIMIT;
+  static const qreal IN_SCALE_LIMIT;
 
   GDPinchGestureRecognizer() {}
 private: