Index: kernel/generic/src/udebug/udebug.c
===================================================================
--- kernel/generic/src/udebug/udebug.c	(revision 897fd8f11ec6c9c4a63697b4ccc6ab67c8be92f2)
+++ kernel/generic/src/udebug/udebug.c	(revision 9ba415e8ec4bc684d1ba8a424cc83de1a57c7aa9)
@@ -394,5 +394,5 @@
  * @param task Task structure. task->udebug.lock must be already locked.
  *
- * @return Zero on success or negative error code.
+ * @return Zero on success or an error code.
  *
  */
Index: kernel/generic/src/udebug/udebug_ops.c
===================================================================
--- kernel/generic/src/udebug/udebug_ops.c	(revision 897fd8f11ec6c9c4a63697b4ccc6ab67c8be92f2)
+++ kernel/generic/src/udebug/udebug_ops.c	(revision 9ba415e8ec4bc684d1ba8a424cc83de1a57c7aa9)
@@ -216,5 +216,5 @@
  * Closes the debugging session for the current task.
  *
- * @return Zero on success or negative error code.
+ * @return Zero on success or an error code.
  *
  */
@@ -236,5 +236,5 @@
  * @param mask Or combination of events that should be enabled.
  *
- * @return Zero on success or negative error code.
+ * @return Zero on success or an error code.
  *
  */