diff --git a/Source/NSImage.m b/Source/NSImage.m
index 3277f8dd1..c6963fcef 100644
--- a/Source/NSImage.m
+++ b/Source/NSImage.m
@@ -1055,10 +1055,10 @@ repd_for_rep(NSArray *_reps, NSImageRep *rep)
       NSWindow *window;
       GSRepData *repd;
 
-      if (NSSizesEqual(NSZeroSize, [self size]))
+      if (NSEqualSizes(NSZeroSize, [self size]))
         [NSException raise: NSImageCacheException
-                     format: @"Cannot lock focus on image with size (0, 0)"];
-
+		    format: @"Cannot lock focus on image with size (0, 0)"];
+      
       if (imageRep == nil)
         imageRep = [self bestRepresentationForDevice: nil];