diff --git a/Source/NSSliderCell.m b/Source/NSSliderCell.m
index c344aed86..c2e0a9bc4 100644
--- a/Source/NSSliderCell.m
+++ b/Source/NSSliderCell.m
@@ -61,7 +61,7 @@
   [super dealloc];
 }
 
-- (BOOL) isFliped
+- (BOOL) isFlipped
 {
   return YES;
 }