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-rw-r--r--tikzit/src/common/ColorRGB.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/tikzit/src/common/ColorRGB.h b/tikzit/src/common/ColorRGB.h
index 1c9b27d..412a1f6 100644
--- a/tikzit/src/common/ColorRGB.h
+++ b/tikzit/src/common/ColorRGB.h
@@ -24,7 +24,7 @@
#import <Foundation/Foundation.h>
#import "RColor.h"
-@interface ColorRGB : NSObject {
+@interface ColorRGB : NSObject<NSCopying> {
unsigned short red, green, blue;
}