Index: kernel/generic/include/proc/thread.h
===================================================================
--- kernel/generic/include/proc/thread.h	(revision 33e15a0909d5c911a064d992b5fbc99a68234b68)
+++ kernel/generic/include/proc/thread.h	(revision 11909ce3e9ef283a8861cf0ab4dac3ee0e36f170)
@@ -147,6 +147,6 @@
 
 	/** Thread accounting. */
-	uint64_t ucycles;
-	uint64_t kcycles;
+	atomic_time_stat_t ucycles;
+	atomic_time_stat_t kcycles;
 	/** Last sampled cycle. */
 	uint64_t last_cycle;