diff --git a/AppKit/CPSlider.j b/AppKit/CPSlider.j
index b89daa56d..04c7f5ce8 100644
--- a/AppKit/CPSlider.j
+++ b/AppKit/CPSlider.j
@@ -312,8 +312,11 @@ var AFFINITY = 5;
     if (!trackRect || CGRectIsEmpty(trackRect))
         trackRect = bounds;
 
-    [self closestTickMarkValueToValue:[self doubleValue]]; // we only need the side effect …
-    _currentTickMarkSegment = _closestTickMarkIndex; // … when "Only stop on tick marks" selected
+    if (_allowsTickMarkValuesOnly)
+    {
+        [self closestTickMarkValueToValue:[self doubleValue]]; // we only need the side effect …
+        _currentTickMarkSegment = _closestTickMarkIndex;
+    }
 
     if (_isCircular)
     {