Index: javax/imageio/spi/IIORegistry.java
===================================================================
RCS file: /cvsroot/classpath/classpath/javax/imageio/spi/IIORegistry.java,v
retrieving revision 1.4
diff -u -r1.4 IIORegistry.java
--- javax/imageio/spi/IIORegistry.java	11 Jan 2005 22:07:32 -0000	1.4
+++ javax/imageio/spi/IIORegistry.java	26 Mar 2005 16:03:11 -0000
@@ -81,7 +81,9 @@
 
     // XXX: Register built-in Spis here.
 
-    ((ClasspathToolkit)Toolkit.getDefaultToolkit()).registerImageIOSpis(this);
+    Toolkit toolkit = Toolkit.getDefaultToolkit();
+    if (toolkit instanceof ClasspathToolkit)
+      ((ClasspathToolkit)toolkit).registerImageIOSpis(this);
     
     registerApplicationClasspathSpis();
   }