diff -up ImageMagick-6.2.8/coders/sgi.c.bz498063 ImageMagick-6.2.8/coders/sgi.c
--- ImageMagick-6.2.8/coders/sgi.c.bz498063
+++ ImageMagick-6.2.8/coders/sgi.c
@@ -213,7 +213,7 @@ static void SGIDecode(const unsigned lon
     pixel=(unsigned long) (*p++);
     count=(ssize_t) (pixel & 0x7f);
     i+=count;
-    if (count == 0 || i >= (long) width)
+    if (count == 0 || i > (long) width)
       break;
     if ((pixel & 0x80) != 0)
       for ( ; count != 0; count--)