diff --git a/Headers/AppKit/NSAnimationContext.h b/Headers/AppKit/NSAnimationContext.h
index 7f5b76032..c5924b6d3 100644
--- a/Headers/AppKit/NSAnimationContext.h
+++ b/Headers/AppKit/NSAnimationContext.h
@@ -59,7 +59,7 @@ DEFINE_BLOCK_TYPE(GSAnimationContextChanges, void, NSAnimationContext*);
 - (NSTimeInterval) duration;
 				      
 - (GSAnimationContextCompletionHandler) completionHandler;
-- (void) setCompletiionHandler: (GSAnimationContextCompletionHandler) completionHandler;
+- (void) setCompletionHandler: (GSAnimationContextCompletionHandler) completionHandler;
 
 @end
 
diff --git a/Source/NSAnimationContext.m b/Source/NSAnimationContext.m
index 7830bb305..8770d71eb 100644
--- a/Source/NSAnimationContext.m
+++ b/Source/NSAnimationContext.m
@@ -68,7 +68,7 @@ static NSAnimationContext *_currentContext = nil;
   return _completionHandler;
 }
 
-- (void) setCompletiionHandler: (GSAnimationContextCompletionHandler) completionHandler
+- (void) setCompletionHandler: (GSAnimationContextCompletionHandler) completionHandler
 {
   _completionHandler = completionHandler;
 }