1 files changed, 1 insertions, 0 deletions
diff --git a/diff.h b/diff.h
index ec76a90522..25ae60d5ff 100644
--- a/diff.h
+++ b/diff.h
@@ -273,6 +273,7 @@ extern int parse_long_opt(const char *opt, const char **argv,
 			 const char **optarg);
 
 extern int git_diff_basic_config(const char *var, const char *value, void *cb);
+extern int git_diff_heuristic_config(const char *var, const char *value, void *cb);
 extern void init_diff_ui_defaults(void);
 extern int git_diff_ui_config(const char *var, const char *value, void *cb);
 extern void diff_setup(struct diff_options *);