diff --git a/sys/sys/procdesc.h b/sys/sys/procdesc.h
index b48b79ab25c..1a3bc98d132 100644
--- a/sys/sys/procdesc.h
+++ b/sys/sys/procdesc.h
@@ -48,7 +48,7 @@
  * Locking key:
  * (c) - Constant after initial setup.
  * (p) - Protected by the process descriptor mutex.
- * (r) - Atomic eference count.
+ * (r) - Atomic reference count.
  * (s) - Protected by selinfo.
  * (t) - Protected by the proctree_lock
  */