Index: kernel/arch/sparc64/src/debug/stacktrace.c
===================================================================
--- kernel/arch/sparc64/src/debug/stacktrace.c	(revision 294f7a5260b357228aa5aad371b33fd290d6a235)
+++ kernel/arch/sparc64/src/debug/stacktrace.c	(revision 991d2d88d7bd9717574341fafeefffc28890114c)
@@ -36,4 +36,5 @@
 #include <syscall/copy.h>
 #include <typedefs.h>
+#include <proc/thread.h>
 
 #include <arch.h>