diff --git a/src/proto/diff.pro b/src/proto/diff.pro
index 93272ac..d4482b1 100644
--- a/src/proto/diff.pro
+++ b/src/proto/diff.pro
@@ -21,7 +21,11 @@
 int diffopt_horizontal(void);
 int diffopt_hiddenoff(void);
 int diffopt_closeoff(void);
-int diff_find_change(win_T *wp, linenr_T lnum, int *startp, int *endp);
+void diff_update_line(linenr_T lnum);
+#ifdef FEAT_DIFF
+int diff_change_parse( diffline_T *diffline, diffline_change_T *change, int *change_start, int *change_end);
+int diff_find_change( win_T *wp, linenr_T lnum, diffline_T *diffline);
+#endif
 int diff_infold(win_T *wp, linenr_T lnum);
 void nv_diffgetput(int put, long count);
 void ex_diffgetput(exarg_T *eap);