diff --git a/src/gui/widgets/timeline/timeline-ibeam-tool.cpp b/src/gui/widgets/timeline/timeline-ibeam-tool.cpp
index fd3b8b87c..0e6e39597 100644
--- a/src/gui/widgets/timeline/timeline-ibeam-tool.cpp
+++ b/src/gui/widgets/timeline/timeline-ibeam-tool.cpp
@@ -27,8 +27,13 @@ namespace lumiera {
 namespace gui {
 namespace widgets {
 namespace timeline {
-  
+
+// ===== Constants ===== //
+
 const int IBeamTool::ScrollSlideRateDivisor = 16;
+const int IBeamTool::ScrollSlideEventInterval = 40;
+
+// ===== Implementation ===== //
 
 IBeamTool::IBeamTool(TimelineBody *timeline_body) :
   dragStartTime(0),
@@ -133,7 +138,8 @@ IBeamTool::begin_scroll_slide(int scroll_slide_rate)
   scrollSlideRate = scroll_slide_rate;
   if(!scrollSlideEvent.connected())
     scrollSlideEvent = Glib::signal_timeout().connect(
-      sigc::mem_fun(this, &IBeamTool::on_scroll_slide_timer), 40);
+      sigc::mem_fun(this, &IBeamTool::on_scroll_slide_timer),
+      ScrollSlideEventInterval);
 }
 
 void
diff --git a/src/gui/widgets/timeline/timeline-ibeam-tool.hpp b/src/gui/widgets/timeline/timeline-ibeam-tool.hpp
index 1d0255913..9be7d17de 100644
--- a/src/gui/widgets/timeline/timeline-ibeam-tool.hpp
+++ b/src/gui/widgets/timeline/timeline-ibeam-tool.hpp
@@ -62,13 +62,14 @@ private:
   void end_scroll_slide();
   
 private:
-  //----- Internals -----//
+  // ==== Internals ===== //
   gavl_time_t dragStartTime;
   sigc::connection scrollSlideEvent;
   int scrollSlideRate;
   
-  //----- Constants -----//
+  // ===== Constants ===== //
   static const int ScrollSlideRateDivisor;
+  static const int ScrollSlideEventInterval;
 };
 
 }   // namespace timeline