diff --git a/src/viewer/mcviewer.h b/src/viewer/mcviewer.h
index 03b4d99fa..2e65e2161 100644
--- a/src/viewer/mcviewer.h
+++ b/src/viewer/mcviewer.h
@@ -38,12 +38,12 @@ extern struct mcview_struct *mcview_new (int, int, int, int, int);
 
 
 /* Shows {file} or the output of {command} in the internal viewer,
- * starting in line {start_line}. {ret_move_direction} may be NULL or
+ * starting in line {start_line}. {move_dir_p} may be NULL or
  * point to a variable that will receive the direction in which the user
  * wants to move (-1 = previous file, 1 = next file, 0 = do nothing).
  */
 extern int mcview_viewer (const char *command, const char *file,
-                          int *ret_move_direction, int start_line);
+                          int *move_dir_p, int start_line);
 
 extern gboolean mcview_load (struct mcview_struct *, const char *, const char *, int);