diff --git a/diff.c b/diff.c
index 059123c5dc..bbb8977539 100644
--- a/diff.c
+++ b/diff.c
@@ -1953,7 +1953,7 @@ static void show_dirstat(struct diff_options *options)
 		if (DIFF_FILE_VALID(p->one) && DIFF_FILE_VALID(p->two)) {
 			diff_populate_filespec(p->one, 0);
 			diff_populate_filespec(p->two, 0);
-			diffcore_count_changes(p->one, p->two, NULL, NULL, 0,
+			diffcore_count_changes(p->one, p->two, NULL, NULL,
 					       &copied, &added);
 			diff_free_filespec_data(p->one);
 			diff_free_filespec_data(p->two);
diff --git a/diffcore-break.c b/diffcore-break.c
index 5473493e10..904156d92e 100644
--- a/diffcore-break.c
+++ b/diffcore-break.c
@@ -73,7 +73,6 @@ static int should_break(struct diff_filespec *src,
 
 	if (diffcore_count_changes(src, dst,
 				   &src->cnt_data, &dst->cnt_data,
-				   0,
 				   &src_copied, &literal_added))
 		return 0;
 
diff --git a/diffcore-delta.c b/diffcore-delta.c
index 4159748a70..e2db85abd9 100644
--- a/diffcore-delta.c
+++ b/diffcore-delta.c
@@ -169,7 +169,6 @@ int diffcore_count_changes(struct diff_filespec *src,
 			   struct diff_filespec *dst,
 			   void **src_count_p,
 			   void **dst_count_p,
-			   unsigned long delta_limit,
 			   unsigned long *src_copied,
 			   unsigned long *literal_added)
 {
diff --git a/diffcore-rename.c b/diffcore-rename.c
index 7f03eb5a04..8ce3b7d661 100644
--- a/diffcore-rename.c
+++ b/diffcore-rename.c
@@ -144,7 +144,6 @@ static int estimate_similarity(struct diff_filespec *src,
 	 * call into this function in that case.
 	 */
 	unsigned long max_size, delta_size, base_size, src_copied, literal_added;
-	unsigned long delta_limit;
 	int score;
 
 	/* We deal only with regular files.  Symlink renames are handled
@@ -190,11 +189,8 @@ static int estimate_similarity(struct diff_filespec *src,
 	if (!dst->cnt_data && diff_populate_filespec(dst, 0))
 		return 0;
 
-	delta_limit = (unsigned long)
-		(base_size * (MAX_SCORE-minimum_score) / MAX_SCORE);
 	if (diffcore_count_changes(src, dst,
 				   &src->cnt_data, &dst->cnt_data,
-				   delta_limit,
 				   &src_copied, &literal_added))
 		return 0;
 
diff --git a/diffcore.h b/diffcore.h
index 33ea2de348..8a9c9d781a 100644
--- a/diffcore.h
+++ b/diffcore.h
@@ -142,7 +142,6 @@ extern int diffcore_count_changes(struct diff_filespec *src,
 				  struct diff_filespec *dst,
 				  void **src_count_p,
 				  void **dst_count_p,
-				  unsigned long delta_limit,
 				  unsigned long *src_copied,
 				  unsigned long *literal_added);