diff --git a/coders/art.c b/coders/art.c
index 3dbc9af..eafb129 100644
--- a/coders/art.c
+++ b/coders/art.c
@@ -309,7 +309,7 @@
if ((image->columns > 65535UL) || (image->rows > 65535UL))
ThrowWriterException(ImageError,"WidthOrHeightExceedsLimit");
if (IsRGBColorspace(image->colorspace) == MagickFalse)
- (void) TransformImageColorspace(image,RGBColorspace,exception);
+ (void) TransformImageColorspace(image,sRGBColorspace,exception);
(void) SetImageType(image,BilevelType,exception);
image->endian=MSBEndian;
image->depth=1;