diff --git a/Headers/AppKit/NSProgressIndicator.h b/Headers/AppKit/NSProgressIndicator.h
index 651f7b724..6ee36316c 100644
--- a/Headers/AppKit/NSProgressIndicator.h
+++ b/Headers/AppKit/NSProgressIndicator.h
@@ -52,8 +52,10 @@ typedef enum _NSProgressIndicatorStyle
 {
   NSProgressIndicatorBarStyle = 0,
   NSProgressIndicatorSpinningStyle = 1,
+  #if OS_API_VERSION(MAC_OS_X_VERSION_10_13, GS_API_LATEST)
   NSProgressIndicatorStyleBar = 0,
   NSProgressIndicatorStyleSpinning = 1
+  #endif
 } NSProgressIndicatorStyle;
 
 APPKIT_EXPORT_CLASS