diff --git a/builtin/shortlog.c b/builtin/shortlog.c
index b316cf37ca768f1502c5d0cfa64372a9b322a572..83605143ac0cea68b421dd9a3c056d3a27f66be9 100644
--- a/builtin/shortlog.c
+++ b/builtin/shortlog.c
@@ -306,9 +306,8 @@ int cmd_shortlog(int argc, const char **argv, const char *prefix)
 static void add_wrapped_shortlog_msg(struct strbuf *sb, const char *s,
 				     const struct shortlog *log)
 {
-	int col = strbuf_add_wrapped_text(sb, s, log->in1, log->in2, log->wrap);
-	if (col != log->wrap)
-		strbuf_addch(sb, '\n');
+	strbuf_add_wrapped_text(sb, s, log->in1, log->in2, log->wrap);
+	strbuf_addch(sb, '\n');
 }
 
 void shortlog_output(struct shortlog *log)
diff --git a/t/t4201-shortlog.sh b/t/t4201-shortlog.sh
index 6872ba1a42ce289c0983b1ed62f05defb493bf49..5493500ef15d2f561bd14ca0bdf5f519ec6f49be 100755
--- a/t/t4201-shortlog.sh
+++ b/t/t4201-shortlog.sh
@@ -120,6 +120,30 @@ test_expect_success 'shortlog from non-git directory' '
 	test_cmp expect out
 '
 
+test_expect_success 'shortlog should add newline when input line matches wraplen' '
+	cat >expect <<\EOF &&
+A U Thor (2):
+      bbbbbbbbbbbbbbbbbb: bbbbbbbb bbb bbbb bbbbbbb bb bbbb bbb bbbbb bbbbbb
+      aaaaaaaaaaaaaaaaaaaaaa: aaaaaa aaaaaaaaaa aaaa aaaaaaaa aa aaaa aa aaa
+
+EOF
+	git shortlog -w >out <<\EOF &&
+commit 0000000000000000000000000000000000000001
+Author: A U Thor <author@example.com>
+Date:   Thu Apr 7 15:14:13 2005 -0700
+
+    aaaaaaaaaaaaaaaaaaaaaa: aaaaaa aaaaaaaaaa aaaa aaaaaaaa aa aaaa aa aaa
+
+commit 0000000000000000000000000000000000000002
+Author: A U Thor <author@example.com>
+Date:   Thu Apr 7 15:14:13 2005 -0700
+
+    bbbbbbbbbbbbbbbbbb: bbbbbbbb bbb bbbb bbbbbbb bb bbbb bbb bbbbb bbbbbb
+
+EOF
+	test_cmp expect out
+'
+
 iconvfromutf8toiso88591() {
 	printf "%s" "$*" | iconv -f UTF-8 -t ISO8859-1
 }
diff --git a/utf8.c b/utf8.c
index 5c61bbe1131e7bbdd939c8b815bd5222b872e3fb..a4ee6650ef6c4c487c083aabf0a950b8ec317b09 100644
--- a/utf8.c
+++ b/utf8.c
@@ -323,7 +323,7 @@ static size_t display_mode_esc_sequence_len(const char *s)
  * If indent is negative, assume that already -indent columns have been
  * consumed (and no extra indent is necessary for the first line).
  */
-int strbuf_add_wrapped_text(struct strbuf *buf,
+void strbuf_add_wrapped_text(struct strbuf *buf,
 		const char *text, int indent1, int indent2, int width)
 {
 	int indent, w, assume_utf8 = 1;
@@ -332,7 +332,7 @@ int strbuf_add_wrapped_text(struct strbuf *buf,
 
 	if (width <= 0) {
 		strbuf_add_indented_text(buf, text, indent1, indent2);
-		return 1;
+		return;
 	}
 
 retry:
@@ -356,14 +356,14 @@ int strbuf_add_wrapped_text(struct strbuf *buf,
 			if (w <= width || !space) {
 				const char *start = bol;
 				if (!c && text == start)
-					return w;
+					return;
 				if (space)
 					start = space;
 				else
 					strbuf_addchars(buf, ' ', indent);
 				strbuf_add(buf, start, text - start);
 				if (!c)
-					return w;
+					return;
 				space = text;
 				if (c == '\t')
 					w |= 0x07;
@@ -405,13 +405,12 @@ int strbuf_add_wrapped_text(struct strbuf *buf,
 	}
 }
 
-int strbuf_add_wrapped_bytes(struct strbuf *buf, const char *data, int len,
+void strbuf_add_wrapped_bytes(struct strbuf *buf, const char *data, int len,
 			     int indent, int indent2, int width)
 {
 	char *tmp = xstrndup(data, len);
-	int r = strbuf_add_wrapped_text(buf, tmp, indent, indent2, width);
+	strbuf_add_wrapped_text(buf, tmp, indent, indent2, width);
 	free(tmp);
-	return r;
 }
 
 int is_encoding_utf8(const char *name)
diff --git a/utf8.h b/utf8.h
index 93ef60042c2fad93184b573f30e771ecddc842be..a214238bdd70c6b4eb41edf6626c5b396489ab50 100644
--- a/utf8.h
+++ b/utf8.h
@@ -9,9 +9,9 @@ int is_utf8(const char *text);
 int is_encoding_utf8(const char *name);
 int same_encoding(const char *, const char *);
 
-int strbuf_add_wrapped_text(struct strbuf *buf,
+void strbuf_add_wrapped_text(struct strbuf *buf,
 		const char *text, int indent, int indent2, int width);
-int strbuf_add_wrapped_bytes(struct strbuf *buf, const char *data, int len,
+void strbuf_add_wrapped_bytes(struct strbuf *buf, const char *data, int len,
 			     int indent, int indent2, int width);
 
 #ifndef NO_ICONV