diff --git a/src/popupwin.c b/src/popupwin.c
index 470bd70..d86c6c0 100644
--- a/src/popupwin.c
+++ b/src/popupwin.c
@@ -3896,7 +3896,7 @@
 	title_wincol = wp->w_wincol + 1;
 	if (wp->w_popup_title != NULL)
 	{
-	    title_len = (int)MB_CHARLEN(wp->w_popup_title);
+	    title_len = vim_strsize(wp->w_popup_title);
 
 	    // truncate the title if too long
 	    if (title_len > total_width - 2)
diff --git a/src/testdir/dumps/Test_popupwin_multibytetitle.dump b/src/testdir/dumps/Test_popupwin_multibytetitle.dump
index e21c0cf..95b0871 100644
--- a/src/testdir/dumps/Test_popupwin_multibytetitle.dump
+++ b/src/testdir/dumps/Test_popupwin_multibytetitle.dump
@@ -1,7 +1,7 @@
 >1+0&#ffffff0| @73
 |2| @73
 |3| @73
-|4| @25|╔+0#0000001#ffd7ff255|▶|Ä|Ö|Ü|◀|═@12|╗| +0#0000000#ffffff0@27
+|4| @25|╔+0#0000001#ffd7ff255|▶|Ä|あ*&|い|う|え|お|◀+&|═@4|╗| +0#0000000#ffffff0@27
 |5| @25|║+0#0000001#ffd7ff255| |T+0&#e0e0e08|h|i|s| |i|s| |a| |l|i|n|e| @1| +0&#ffd7ff255|║| +0#0000000#ffffff0@27
 |6| @25|║+0#0000001#ffd7ff255| |a|n|d| |a|n|o|t|h|e|r| |l|i|n|e| |║| +0#0000000#ffffff0@27
 |7| @25|╚+0#0000001#ffd7ff255|═@17|╝| +0#0000000#ffffff0@27
diff --git a/src/testdir/test_popupwin.vim b/src/testdir/test_popupwin.vim
index 62e19fa..83d632e 100644
--- a/src/testdir/test_popupwin.vim
+++ b/src/testdir/test_popupwin.vim
@@ -1817,7 +1817,7 @@
   call VerifyScreenDump(buf, 'Test_popupwin_longtitle_4', {})
 
   call term_sendkeys(buf, ":call popup_clear()\<CR>")
-  call term_sendkeys(buf, ":call popup_menu(['This is a line', 'and another line'], #{title: '▶ÄÖÜ◀', })\<CR>")
+  call term_sendkeys(buf, ":call popup_menu(['This is a line', 'and another line'], #{title: '▶Äあいうえお◀', })\<CR>")
   call VerifyScreenDump(buf, 'Test_popupwin_multibytetitle', {})
   call term_sendkeys(buf, "x")
 
diff --git a/src/version.c b/src/version.c
index fedc23b..206234d 100644
--- a/src/version.c
+++ b/src/version.c
@@ -756,6 +756,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3304,
+/**/
     3303,
 /**/
     3302,