Index: kernel/generic/include/interrupt.h
===================================================================
--- kernel/generic/include/interrupt.h	(revision 9ac2013bb53c62688dcd0e2009ddb5c40df48cc1)
+++ kernel/generic/include/interrupt.h	(revision 6fe0bf8de5aa2032128982d03e2f8b3240b3e508)
@@ -60,4 +60,5 @@
 extern void fault_if_from_uspace(istate_t *, const char *, ...)
     PRINTF_ATTRIBUTE(2, 3);
+extern istate_t *istate_get(thread_t *);
 extern iroutine_t exc_register(unsigned int, const char *, bool, iroutine_t);
 extern void exc_dispatch(unsigned int, istate_t *);