diff --git a/src/proto/indent.pro b/src/proto/indent.pro
index 71028ac..b9c071c 100644
--- a/src/proto/indent.pro
+++ b/src/proto/indent.pro
@@ -10,4 +10,17 @@
 void do_c_expr_indent(void);
 void fixthisline(int (*get_the_indent)(void));
 void fix_indent(void);
+int tabstop_set(char_u *var, int **array);
+int tabstop_padding(colnr_T col, int ts_arg, int *vts);
+int tabstop_at(colnr_T col, int ts, int *vts);
+colnr_T tabstop_start(colnr_T col, int ts, int *vts);
+void tabstop_fromto(colnr_T start_col, colnr_T end_col, int ts_arg, int *vts, int *ntabs, int *nspcs);
+int tabstop_eq(int *ts1, int *ts2);
+int *tabstop_copy(int *oldts);
+int tabstop_count(int *ts);
+int tabstop_first(int *ts);
+long get_sw_value(buf_T *buf);
+long get_sw_value_indent(buf_T *buf);
+long get_sw_value_col(buf_T *buf, colnr_T col);
+long get_sts_value(void);
 /* vim: set ft=c : */