diff --git a/coders/sgi.c b/coders/sgi.c
index 1b83a72..15f346a 100644
--- a/coders/sgi.c
+++ b/coders/sgi.c
@@ -907,7 +907,7 @@
     /*
       Initialize SGI raster file header.
     */
-    if (IsRGBColorspace(image->colorspace) == MagickFalse)
+    if (IssRGBColorspace(image->colorspace) == MagickFalse)
       (void) TransformImageColorspace(image,sRGBColorspace,exception);
     (void) ResetMagickMemory(&iris_info,0,sizeof(iris_info));
     iris_info.magic=0x01DA;